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How often to change the water in the aquarium

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How and how much to change the water in the aquarium, the frequency of water changes


How to change the water in the aquarium?

In this article we will discuss a fairly simple, but at the same time, a difficult question regarding the change of water in the aquarium. It is simple because there is no need to replace water in the aquarium. However, there are a lot of nuances and certain specifics that you need to know on this issue. The matter is further complicated by the lack of complete, comprehensive information on the Internet. As a rule, information about the change of water in an aquarium is either compressed, or one-sided, or only a certain part is covered.

No exception was our site. Here, for example, article Boiled, melted or distilled water for aquarium. It seems the article is good, but narrow and concise.

So let's fix this defect. As much as possible and fully consider the question: "How to change the water in the aquarium?" That in turn, will give us the opportunity to make the change of water as simple and effective as possible.

For convenience, let's break down the article into the following sections:

1. WHY DO I NEED TO CHANGE WATER IN THE AQUARIUM, DO I NEED TO DO IT AT ALL?

2. WHY FOR DEFINING AQUARIUM WATER?

3. HOW IS THE CORRECT AND HOW MUCH ON TIME DO I NEED TO LEAVE WATER FOR AQUARIUM?

4. WHAT TO DO IF A BIGGER NUMBER OF AQUARIUM WATER IS NECESSARY TO DECLINE? OTHER WAYS OF PREPARING WATER FOR THE AQUARIUM?

5. HOW OFTEN AND IN WHAT VOLUME DO I NEED TO REPLACE AQUARIUM WATER WITH FRESH?

6. THE RIGHT ORDER IS THE PROCESS OF CHANGING AQUARIUM WATER.

WHY DO I NEED TO CHANGE WATER IN THE AQUARIUM, DO I NEED TO DO IT AT ALL?

Many novice aquarists are faced with different opinions about the need to change the aquarium water. Often in the forums or from friends you can hear the phrase: "That I do not change the water at all and .... everything is OK" or "I rarely, rarely ... and also OK." Here that, at the beginner and there is a stupor! How so? I’ve furnished the whole balcony with buckets, how I carry a water carrier from the bathroom to the aquarium, but it turns out that this is “monkey work” !? Without tormenting for a long time, I will answer you - do not listen to these "uncles and aunts"! They mislead you. AQUARIUM WATER MUST BE CHANGED!

And the thing is this! In the process of vital activity of all aquatic aquatic organisms (inhabitants), the aquarium itself, or rather, the water becomes clogged. For example, an excess of food, fish feces, dead leaves of plants and other organic matter. All this "dirt" turns into the most terrible poison - ammonia, which is destructive for all living things in an aquarium. Further, the nitrifying bacteria that are in the water, the filter and the soil "decompose" ammonia to nitrite (poison), then nitrate ("weak" poison), and then the remains are converted to gaseous state and leave the water.

So, no matter how many useful nitrifying bacteria are in the aquarium of colonies, no matter how many live plants are in the aquarium, which also partially absorb ammonia, no matter how powerful the filters are ... no matter, the above poisons tend to accumulate. And you can bring them ONLY REGULAR REPLACEMENT OF WATER TO CLEAN.

What happens in an aquarium for those who do not change the water for a long time? Many aquarium fish tend to adapt and live in the worst conditions - get used to the poisons. However, this function of "survival in any conditions" is not eternal. In fish, irreversible changes occur in the internal organs, mucous membranes and gills. Fish weaken, their immunity falls. And the “Doomsday” comes when an outbreak of a bacterial, fungal or infusorian attack occurs ... not many survive!

In total, the change of aquarium water is one of the most important ways to maintain "health in the aquarium", one cannot do without it. Laziness in this matter is a fatal mistake!

WHY DRAIN AQUARIUM WATER?

HOW IS IT CORRECT TO DO IT?

There is such a non-contagious sore in fish, called Gas embolism. In a nutshell - this is the entry of small air bubbles into the blood vessels and blood of fish. As a result, there is a blockage of blood vessels. Fishes begin to swim sideways, the behavior becomes alarming, fearful. The fins and the whole body begin to tremble convulsively. The movement of the gill covers slows down, and then completely stops ... further death!

A frequent cause of gas emboli is inadequate settled water for an aquarium. The fact is that tap water (tap water) is excessively saturated with air bubbles that are so small that they are not even visible to the human eye. Just imagine how much water “poured through the pipes” until it reached your tap!

Thus, filling the tap water in an aquarium with fish - YOU ARE VERY RISK. Yes, in practice, everything can do, but this is a game of Russian roulette.

What happens to water if it is defended? What happens is that small bubbles gradually merge and come out of the water. Water saturation by air decreases, the risks are reduced to zero.

In addition, it is worth noting that in the process of settling water for the aquarium, heavy and harmful compounds, for example, chlorine as sediment at the bottom of the container and film on the surface of the water, settle.

HOW IS THE CORRECT AND HOW MUCH ON TIME DO I NEED TO LEAVE WATER FOR THE AQUARIUM?

Everything is simple and should not cause much difficulty. The water in the aquarium should settle in a container with a wide neck: a bucket, a basin, an enamel saucepan. You understand that in a bottle with a narrow neck, excess air goes out poorly. Container for sludge should not be metallic, rusty or made of toxic substances or paints. Plastic buckets, perhaps the best and easiest option for defending aquarium water.

About time! ... The longer the water settles, the better! I personally defend the water for 7 days - this is convenient and coincides with my Sunday schedule for changing the water in the aquarium. In general, such terms of water settling 1-14 days roam the Internet.

WHAT TO DO IF A LARGE AMOUNT OF WATER IS NECESSARY TO DECLINE? OTHER WAYS OF PREPARING WATER FOR THE AQUARIUM?

But this is really a problematic issue for owners of large aquariums and not large apartments! How to defend 50, and then 100 liters of water?

If this is a new aquarium and the first launch of the aquarium is made, you can immediately fill in the aquarium with tap water, defend it and at the same time add air conditioners to improve the quality of water.

If water is needed for replacement, then our first glance is the only rational option is to purchase construction containers (plastic buckets for mixing mixtures) for 50, 100 liters.

Other ways to prepare aquarium water in the first place include: boiling, freezing water, as well as its purchase of water in the store. See more about this. HERE.

Also, aquarium water can be prepared using special air conditioners such as: Tetra AquaSafe, AMMO-LOC, Sera aqutan and others.

Here is a video about one of them:

HOW OFTEN AND IN WHAT VOLUME DO I NEED TO REPLACE WATER IN THE AQUARIUM?

Almost in all books, on all sites, they write standardly what needs to be changed weekly? part of the water from the total volume of the aquarium. This is a generally accepted norm, BUT NOT DOGMA. Here, look, please statistics of the survey, which is conducted on our site.

How often do you change the aquarium water to fresh?

As you can see, everyone changes the water in different ways and the weekly replacement of aquarium water is not a dogma! Why? It's very simple - everyone has different aquariums, different fish, plants, and so on. For example, there are fish that love the "old" water and the frequent change of water only annoys them (the family of labyrinth fish). The abundance of living plants, also reduces pollution in the aquarium. In the end, someone has a large aquarium, someone has a small, someone has a big fish, and someone has a small one.

All this individual specificity of the content of fish excludes the concept dogma number and frequency of substitution of aquarium water. And there is only one advice - you should adapt yourself and you should come to the conclusion about how often and how much water you need to change in your aquarium. In this case, you must take into account the volume of the reservoir, the population of the aquarium, the individual characteristics of the fish, the presence or number of plants, the filter power, the presence of ion exchange resins in the filter, and so on.

THE RIGHT ORDER OF CHANGING AQUARIUM WATER

Finally, I want to give attention to the beginner aquarists, that it is only necessary to change the aquarium water after cleaning the aquarium, and not before.

That is, first we:
- clean the filter and other equipment;
- wipe the walls of the aquarium;
- we thin and cut the plants;
- siphon soil;
- produce other manipulations and permutations;
- and only then we replace part of the water with fresh one;

If you have any questions, any comments on the article, please leave them in the comments - we will discuss.

Useful video about changing aquarium water

Replacing aquarium water

Water for aquarium fish must be supported by a certain composition, in which the proportion of substances from the decay of organic matter is regulated. Despite the fact that in many respects equilibrium is achieved through the use of filtration, it is necessary to carry out regular replacement of water. Deciding how to change the water in the aquarium, its owner must represent what kind of results he wants to achieve.

How to change the water in the aquarium

Replacing the water in the aquarium is an obligatory process for its maintenance. There are partial substitution and complete replacement of water.

Partial water change

Partial substitution in a freshwater aquarium is necessary to maintain the balance of the formed environment due to the fact that it evaporates and changes its composition. However, before changing the water in the aquarium, time should pass from the day of its launch: at least 2 months.

The frequency of partial replacement procedures is once every 1-2 weeks. Replace recommended 1/5 of the total.

Beginner aquarists face the question: how much to defend the water for the aquarium? If tap water does not contain chlorine and phosphates, then it can and not be defended. To check the presence of harmful substances should be tests. If these compounds are in tap water, then you can defend it for day 3. Also, the preparation of water for the aquarium can be carried out using special compositions to change the chemical composition of the water. With a sufficiently large volume of the aquarium (more than 150 liters) without special preparation, you can replace up to 20% of water in it.

Deciding what kind of water is needed for an aquarium when carrying out a partial substitution, should be guided by the capriciousness of the species of fish and plants that inhabit it.

Big substitution of water in several stages

The big substitution is the replacement of a significant amount of water in several stages during the week. Such a replacement of water in aquariums is used when you need to repeatedly reduce the level of substances accumulated in the water. After such a procedure, the fish become more active. But it should not be made too often.

How to change the water in the aquarium gradually, but in large volumes?

Consider the example of an aquarium in 100 liters. If there is little vegetation in it, such a change of water in the aquarium can be done as follows: drain 80 liters and add 40 liters of new water, and then after the remaining 40 liters.

For aquariums densely populated with fish or planted with algae, this option super-substitution is not acceptable: you can replace up to 60% of the total at one time.

It is convenient to use super substitution, which takes place in several stages. 60% of the volume of water in the aquarium is drained and only 30% is added, then half of the remaining is discharged and the same volume is added. The last manipulation is repeated 2 times, then add another 30% to the full volume of the aquarium. All stages of this super substitution take place in one week. At the same time, the concentration of harmful substances in water decreases to 8% of its initial volume.

Full replacement of water in the aquarium

Complete replacement of all water in established aquarium systems is extremely rare and in exceptional cases. It adversely affects its inhabitants: the leaves of plants grow brighter and die off more quickly, and some fish may die.

What water is needed for aquariums when it is completely replaced? Water should be prepared in advance, otherwise all the benefits of such a replacement will be leveled by a sharp change in pH-environment and water temperature, which, in turn, will be stress for fish. Therefore, for effective replacement of water it is often necessary to change its chemical composition.

How to change the water in aquariums with sea water

The main question for novice marine aquarists is how to change the water in an aquarium with sea water, without disturbing its composition. The main reason for its replacement: an increase in the concentration of nitrites and nitrates in water.

Replacing water in an aquarium with a marine bio-system is different from a freshwater aquarium. Firstly, if there are whimsical hydrobionts in the aquarium, it is recommended to take water either distilled or passed through reverse osmosis. There are aquarists who successfully use tap water to replace small amounts of water in fish aquariums. However, beginners should be aware that such a replacement is far from being possible for all types of marine fish and the water must be pre-filtered.

There are many discussions among non-professional owners of saltwater aquariums on how to change the water in aquariums with sea water. It is believed that the monthly substitution, which occurs in 5-20% of the water in the aquarium, does not give the desired effect if the aquarium is heavily polluted. But replacing large amounts of water destabilizes the balance. Therefore, the frequency of this process and the volume of water being replaced are determined by the efficiency of a particular aquarium. The need for an emergency replacement will be recognized by conducting regular water testing using tests.

The process of preparing water for the aquarium is simple. The purified water dissolves salts, which include: MgSO4x7H20, NaCI, KBr, MgCl2x6H2O, SrCl2x7H20, Na2CO3, CaCI2, KCI, H3BO3, NaHCO3, NaF. It lasts 3 days and it is better to add salts in a certain sequence.

Full replacement of water in the marine aquarium is carried out only as part of its restart.

How and when to change the water in the aquarium

Water for aquarium fish should be maintained in a constant composition, which will regulate the amount of organic impurities in it. Biological equilibrium can be achieved through filtration and regular water renewal. Proper renewal of water in an aquarium with fish is the key to their health and good life, because this procedure preserves the mini-ecosystem of the home nursery.

Types of replacement in an artificial reservoir

Replacing water in an aquarium is an indispensable component of its content. There are 2 types of water changes - partial change and full change.

  1. Partial replacement in a freshwater aquarium maintains the biological balance of the aquatic environment, despite the often changing composition of the fluid. Before changing the water, from the moment of its first launch, you need to wait two months. Correctly update the water 1-2 times a week, no more than 20-30% of the total. It is often dangerous to change water - it usually leads to deterioration of water quality and neutralization of beneficial microflora.

See how to make a partial replacement of water in the aquarium.

  1. Complete replacement of water is needed as a last resort - when all the aquarium fish are sick. One fish can be quarantined, in the case of disease of all residents of the nursery you want to change all the liquid. There are a number of drugs that help cure ailment, but they contain chemicals that pollute water, after which it will be unsuitable for life. In this case, a complete replacement of water is often a necessary measure, since even drugs cannot completely destroy the pathogenic microbes. Change all the water you need with a special device - aquarium hose, which is on the shelves of pet stores. When completely replacing the hose with a hose, siphon the bottom, cleaning it from contamination, and the glass container is washed with a special liquid to remove plaque. If you need to fight the disease - you will have to bring all the details back to normal, all the water updates are not enough.
  • Attention!

A complete water change is required during a scheduled restart.

Aquarium water: how to defend?

How many checks are needed to normalize the water in the aquarium? It rarely happens that tap water does not contain chlorine and phosphate compounds, and if so, then this is a lot of luck. You can purchase litmus paper at the pet store, using it to measure the acidity and hardness of water from the tap. Water in a small aquarium is easier to put in order than in a large one. Special components that increase or decrease water hardness can be found in stores or in your own home. In aquariums with a volume of more than 150 liters, you can replace 20% of the water yourself, without prior preparation.

How much time to defend the water? Everything depends on the type of fish that will settle in the reservoir, on their requirements, on the whimsical nature of aquatic plants - after all, the fish often live with plants, and they are almost indispensable. If it does not meet the pH level of 7.0, then it can be defended for 3-4 days until the chlorine and phosphate compounds evaporate.

Aquarium water: what you need to know about the big replacement?

A large water change is the renewal of a significant amount of fluid that occurs in stages over a period of 5-7 days. It is necessary to change such water when there is a need to lower the level of compounds accumulated in the water. Often after a big replacement, the fish become healthy and active. However, changing the contents of the reservoir is not recommended very often.


In a 100-liter aquarium with a small amount of vegetation, you can make the following replacement:

Drain 80 liters of old and add 40 liters of new water, add another 40 liters in a day. But this option is unacceptable for reservoirs where there is a lot of vegetation and fish. In this case, it is better to update 60% of the volume once.

Recommendations for replacing in saltwater aquariums

Sometimes you need to change the water in an aquarium with sea water, if it is in the house. Replacement should occur at elevated concentrations of nitrates and nitrites. Updating a saltwater aquarium does not go as it does in a freshwater aquarium. Properly used with distilled salt water or distilled through reverse osmosis liquid.

Whimsical hydrobionts and sea fish will not be able to live in tap water. Without prior, multi-phase filtering, it only hurts sentient beings. Replacing water 1 time per month (10-20%) of the total volume of the reservoir is not particularly effective with heavy pollution. In saltwater aquariums, it is better to replace a large amount of water.

See how to run a saltwater aquarium.

How to know that it is time to update the aquatic environment in a salt water tank?

How much time must pass to have to renew the aquatic environment in the marine tank again? The first is to check periodically observations and tests using reagents. The pure water dissolves salts that contain: MgSO4x7H20, sodium chloride, potassium bromide, MgCl2x6H2O, SrCl2x7H20, sodium carbonate, calcium chloride, potassium chloride, boric acid, sodium hydrosulfite (acid salt), sodium fluoride. These components are part of the artificial sea salt, which must be added over 3 days gradually, one after the other. But this option is very difficult for beginners. In order not to harm the fish and plants, there is a second way - to monitor the quality of the tank (whether there are greens in the water, foam, haze, droppings), its purity and smell.

Also make sure that the quality of the filter has not changed (both mechanical and biological). High-quality filtration prevents severe contamination, so there will be no need to completely change the fluid in the pond. A good filter restores the biological balance of the nursery, making it suitable for further use.

Aquariums: how to change the water in the aquarium? How much to defend the water for the aquarium

There are three main questions that are asked by people who have recently purchased aquariums. How to change the water in the aquarium? How often do this? And, finally, how long to defend the liquid to protect the fish from the effects of harmful substances? In this article we will try to answer these questions.

The main thing that needs to be learned by a beginner aquarist is that he does not breed fish or snails and does not grow algae, but contains a biological environment. This is not a cat or a dog. And not even a turtle. An aquarium is a closed ecosystem, all efforts should be directed at maintaining its livelihoods. And in a healthy environment and the inhabitants live well.

Life cycles of aquariums

If you pour water into the tank, even if it is separated, you will not create a biological sphere that is comfortable for the fish. Moreover, being released into such a sterile environment, many inhabitants can die from shock. First you need to put the soil, plant the plants and only a week later to launch the first fish. But even at this time it cannot be said that the hydrobiological environment is fully formed. This condition is called by the connoisseurs "new aquariums".

How to change the water in this type of aquarium? This should be done not earlier than two months after the launch of the inhabitants. The change of water can slow down all the processes of establishing balance, and in small containers it will cause a catastrophe and a massive death of fish. It is allowed in a month to drain 10% of the water and fill it up to the previous volume with fresh water.

New Aquariums

How to change the water in the aquarium two or three months after the launch of the first fish? The hydrobiological environment is still quite young. But already on the ground and glasses may accumulate some deposits. Every two weeks with a special siphon drain 10% of the liquid. If you do not have such an opportunity, it is permissible to change the water once a month, but then it is necessary to update 20% of the filling capacity. During this procedure, do not forget to clean the primer and glass. Also remove faded leaves of algae. Even if you have launched catfish and snails in an aquarium, there is no guarantee that they will fully cope with their task of cleaning the bottom sediments and sticking to the walls. The question arises how to clean the soil if the water is not completely drained. We will return to this issue.

Mature aquariums

How to change the water in the aquarium during this period and when will the biological balance be completely in it? This happens about six months after the installation of the aquarium. Moreover, the greater its volume, the more difficult it is to shake this achieved balance. Therefore, newcomers are advised to start large aquariums (per 100 liters), so that they, by their inept actions, do not disturb the aquatic habitat. During this period of maturity, which lasts up to a year, we only do that we change 20 percent of the liquid every month, removing garbage from the ground and cleaning the mucus from the glasses. However, you need to carefully monitor that the water is not "bloomed" (not green). With regular cleaning it will be a long time to enjoy the crystal clear eye of the aquarium and the agility of the fish that inhabit it.

Period of old age: reboot

After a year and a half, the habitat in a closed container begins to degrade. To return her second youth, it is necessary to change the water every two weeks. Along with regular updates (in the amount of 20% of the total volume), the following procedure can be practiced from time to time. For experienced aquarists, it is called super-substitution. So, your tank is filled with water. Drain 60%, clean the walls and add only 30%. The next day, remove half of the remaining liquid and add the same amount. We repeat this manipulation for two more days. And, finally, topping up the aquarium by 30% to the previous level. Thanks to super substitution, the concentration of harmful substances will decrease by 92%.

How to change the water in the aquarium

So, we have considered the proportions that must be adhered to so that the fluid update does not damage the biological balance of the living environment. But how to change the water? Pet stores sell special siphons (with a manual blower for pumping air or working on batteries), but these devices also have a more budgetary alternative. Take a regular straw. It is better not to use a rubber hose - rubber emits harmful substances. The transparent PVC tube will be optimal. Wrap one end of it with a piece of gauze. Prepare a bucket - set it below the level of the aquarium. Dip the tip of the tube with gauze into the water, and take the second in the mouth. Begin to draw in air until the liquid is suitable. After that, with a quick movement, lower the tip of the tube into the bucket. Water under the laws of the pouring of the tank into the tank. You just have to control its quantity. And with the tip of the tube with gauze, drive along the walls and the ground to remove the adhering dirt.

Water quality

The amount of fluid added is not the only indicator that is important for the health of the inhabitants. The quality characteristics - temperature, salinity (for marine fish) and water hardness in the aquarium - are also of great importance. Sharp change of any indicator is a shock for the inhabitants. For tropical fish, topped up water should be heated to a temperature of 1-2 degrees higher than that in the aquarium. The marine biosystem also needs the liquid to have the right ppm. To do this, in distilled or reverse osmosis water for three days dissolve salts NaCI, MgSO4x7H20, KBr, SrCl2x7H20, MgCl2x6H2O, Na2CO3, KCI, CaCl2, H3BO3, NaF and NaHCO3.

How much to defend the water for the aquarium

It is not a secret for anyone that not fresh spring water flows from our taps, but a liquid in which almost the entire periodic table is dissolved. It is easy to notice by conducting a simple experiment. Take a can of water and see what happens to it over the course of a few hours. First, gaseous impurities. It would be good if it was oxygen. Although an overabundance is unhealthy for fish. The bubbles through the gill slit penetrate the bloodstream and can provoke thrombosis. But ozone, which in some cities is used to disinfect water, is poison. The same undesirable elements are chlorine and its compounds. It is good that the gases come out of the liquid quickly - it takes an hour. But the limescale and rust accumulated from old water pipes, settles at the bottom of the can after 12 hours. Dissolved impurities can be neutralized with special conditioners (for example, Sera Toxivec). Here is the answer to the question. It makes no sense to defend water for more than a day. Everything that could precipitate or evaporate has already done so. And then the water is just beginning to fade, harmful microorganisms start in it and dust rushes in.

In what situations should be carried out a complete replacement of water

Only emergency cases - the massive death of the inhabitants or the global "blooming" of water - can cause the entire aquarium to be emptied, sanitized and started all over again. But if the liquid still does not emit a sharp unpleasant smell, it is fixable without a complete replacement. To remedy the situation, you should understand the reason why the water in the aquarium turns green. Perhaps the whole thing in the wrong light. Then the situation will be corrected simply by rearranging the aquarium into a more obscured corner of the room. If the reason was the reproduction of primitive floating alga euglena, then you can buy live daphnids - this is cleaning green scum and feeding for fish. Somiki, pecilia, mollies, snails are also happy to devour euglena. In pet stores you can buy special chemicals from the rapid flowering of water.

How often do I need to change the water in the aquarium and how? Fish in bags?

Svetlana Stepanova

How often should I change the water in the aquarium?
After the aquarium is planted with plants and populated with fish, an amateur should strive to maintain. It has a steady regime. For the normal development of fish and the prevention of a number of diseases, a certain chemical composition and biological equilibrium, maintained for many years, are necessary in water.
Water should be refilled as it evaporates, cleans the glass, the aquarium soil only partially, no more than 1/5 - 1/3 of the volume of the aquarium. Moreover, even a partial replacement of water should not drastically change both its gas and salt composition.
In aquarium fish farming, complete replacement of old water is extremely rare. Even with the massive death of fish it does not completely change. When completely replacing the water, it is necessary to be sure that the new water meets all the hydrochemical parameters required for the existing fish species.
Completely change the water in the aquarium in exceptional cases: when introducing unwanted microorganisms, the appearance of fungal mucus, rapid flowering of water that does not stop when the aquarium is darkened temporarily, and when the soil is very dirty. From the complete change of water plants suffer: there is discoloration and premature dying of the leaves. If the aquarium is biologically correctly populated, then plants, fish and bacteria in the soil and water can replace a good filter.
A common opinion among novice aquarists about the need for frequent water changes as a prerequisite for the normal maintenance of exotic fish is deeply mistaken. Frequent changes of water in the aquarium can cause illness and even death of fish.
In most cases, a water change — although a regular change of 1/5 of the water in an aquarium is always desirable — does not have a living stage of a room pond. This life in an aquarium, depending on our ability and desire, can last from several days to 10-15 years.
What does that require?
Replacing water by 1/5, up to certain limits, of course, (topping up with non-living tap water) will shake the equilibrium state of the environment, but after two days it will be restored. The larger the aquarium, the greater the resistance in it against our inept interventions.
Replacing half of the medium will break the equilibrium stability, some fish and plants may die, but after a week the other homeostatism of the medium will again be restored.
Replacing all the water with a plumbing can completely destroy the environment, and everything will have to start over.
* If you decide to start an aquarium, and have not dealt with it before, but there is a desire to arrange everything not hastily and somehow, start with a small reservoir of 100-200 liters. It is just as easy to establish biological balance, to form a living environment, as in a small one, and to destroy it with its inept actions will be much more difficult than in an aquarium with a capacity of 20-30 liters.
In an aquarium, we do not contain aquatic animals and plants, but aquatic habitats, and the main task of an aquarist is to maintain an equilibrium, healthy state of this particular environment, and not its individual inhabitants, because if the environment is healthy, then the inhabitants of this environment will be well . The habitat in the period of its formation (when plants were planted in the ground, and a week later the first fish were launched) is extremely unstable, therefore it is strictly prohibited to interfere with the work of the aquarium at this time. What do we have to do?
Within two months, it is impossible to replace water: what's the point, instead of semidiving water, which is just turning into residential water, to bring in a sterile water supply again? In a large aquarium, changing water will slow down the formation of the habitat, while in a small aquarium this intervention will cause a catastrophe and everything will have to start over.

Vitaly Stoykov

There is no need to change the water in the aquarium because there is a certain balance. Just when cleaning the aquarium, part of the water with the waste products of the fish is drained, and separated clean water is added to the aquarium.

Galina Emelianenko

fish in a basin of clean water and cover with something to not jump out (if on the aquarium cover plates lie above they will fit) and the water in the idale needs to be changed once a month, although everything depends on the aquarium and on what filter you have there or it is not =)

Elena Grigorieva

A complete change of water is made ONLY in extreme situations (for example, an infection is recorded in the aqua that requires similar radical measures), replacement (one third of the volume of aqua) with simultaneous cleaning of the soil (siphon) is done every 7-10 days. I keep the aqua 5 years, did not change the water completely.

Tell me how often you need to change the water in the aquarium, and how should it be done at all?

Sergey Ovchar

The following factors matter:
1) aquarium size
2) what filter is there
3) how populous is the aquarium
4) Are there plants in the aquarium?
For example, I have an aquarium of 450 liters, there is a good TETRA canister filter, there are no plants. And although the aquarium is somewhat overpopulated (a bit too much fish), I do not change the water at all. Once a month - two topping up only what has evaporated.
As far as I understand, you are a beginner aquarist and you probably have a small aquarium.
Therefore, I advise you the following:
1. replace a third of water once a week by filling in simple tap water, but separated (hours 8-10)
2. Buy and add Tetra Easy Balans to the water, how? - it is written on the bottle. Then the water can be changed less frequently.
3. If you planted plants, the water should be replaced more often, so that the water was soft enough.
4. Be sure to have a good filter.
And finally, if your water becomes cloudy, do not rush to drain it and change it to clean. Just wash the filter and do not feed the fish for 3-4 days. Fish will not be anything, and the water is clean.

Speeding

Ideally, the water does not change at all. If the aquarium is organized properly, water is only occasionally added as it evaporates. Naturally, it should stand for at least 2-3 days and have the same temperature as the water in the aquarium. Pour carefully, putting a sheet of white paper on the surface of the water in the aquarium, and pouring on it…

Secret

Completely all the water in the aquarium can not be replaced. This can kill the fish: launching it into clean (new) water, you break the microflora that was in the aquarium before the change of water.
If the aquarium contains adult fish, then when changing the water, only one-third is updated, and not more than once a week. For others, 1/5 - no more than once a month.
When the fish is young, the water needs to be changed more often, because in the aquarium a lot of organic matter (decomposition products) accumulates, which “presses” on the growth of the fish. If water replacement does not occur, then the fish may remain the same size as it was launched into the aquarium. Pour water should be the same temperature as in the aquarium.
Complete replacement of water in an aquarium can be successful with the observance of two rules: maintaining the temperature plus treating the water with preparations that create the initial micro flora.
Be sure to change the water in the aquarium if it began to smell. The reason for this can serve as excess food, which is clogged in the ground.
To care for the aquarium, we need a bucket, a regular or special hose with a nozzle-siphon (the hose is better to use transparent PVC, ordinary rubber can release unwanted components into the water, and the rubber quickly ages and becomes unusable). You also need a special glass scraper and possibly scissors. Scissors will be needed if necessary to cut overgrown plants, although many aquarists simply pick them off with their hands. But the main working tools are still a hose and a bucket.
Probably everyone saw how drivers with a hose poured gas from the tank? It's very simple - the hose is thrust into the tank (in our case, the aquarium), the other end is taken into the mouth and the liquid is gently sucked. The main trick in this procedure is to have time to put the end of the hose in the bucket before you take a sip of water. After a little practice, this is quite easy and simple, and the water happily murmurs from the aquarium into the exposed vessel. Of course, the bucket must stand below the water level in the aquarium, otherwise it will not work.You can do otherwise - the hose is completely heated in the aquarium, completely filled with water, then the ends of the hose are gently pinched, one end is transferred to the bucket and released there. Even if a small amount of air bubbles remain in the hose - it is not scary. They will make the flow of water. In addition, various devices facilitating this procedure are on sale - hoses with a rubber bulb (a valve allowing water only in one direction is built into it) or even special electric siphons on batteries. But in terms of simplicity and cheapness, the usual hose is most convenient! One remark, you should not try to take a hose of too large a diameter, for a thorough cleaning of an aquarium a hose with a diameter of 10-15mm is best, no more. Thicker hoses are convenient only when replacing a large amount of water at once, it is inconvenient to clean with their help - as long as you bring the end of the hose to a pile of dirt at the bottom, the bucket has time to be filled.
So, the water poured into the bucket, what to do next? Again, nothing complicated - you lower the other end deeper into the aquarium (it is better to stick your hand in the water, otherwise the hose is too difficult to send to the right places) and start to drive them in places of accumulation of dirt or remnants of undernourished food. I just want to warn you - the flow of water turns out to be very strong and can begin to suck the sand from the bottom, and an unwary or too curious fish can also tighten. To weaken a little the flow at the end of the hose is often dressed funnel. This greatly simplifies the cleaning procedure, and the sand remains in the aquarium, and does not migrate all into the bucket.
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How often should I change the water in the aquarium ?? ? 35 liters

Svetlana Kuntysh

For most types of aquariums, water in the aquarium is enough to update! Every 7-10 days! At the same time, the remnants of food and garbage are removed from the bottom, about 1/5 of the water is drained and replaced with fresh, pre-settled water. A complete change of water in an aquarium is extremely rare in exceptional cases: when a fish is ill (for example). A complete change of water is equivalent to the launch of a new aquarium, with all the ensuing consequences.

Lt

Often you can not change in any case, the maximum every six months. they have no bio-balance from this, well, it's like a week to the desert, and the next to the tundra. Just pour in some water and collect dirt from the bottom.

Just Vasya

water in the aquarium is changed once a year. the rest of the time is made up with overflow water. In general, in order to balance the system it is desirable to have an aquarium larger than 60 liters. It is easier to handle. at full change, the water will still grow cloudy due to the development of microflora. another advice to wash the filter from the impeller but not to perfect purity, brown mucus is the useful microflora that processes organic matter. It is useful to do fasting days for fish. And try not to overfeed the fish.

Do I need to change the water in the aquarium completely?

Nikolai

can be changed completely. we catch fish in which thread is clean with water (add from the aquarium); we pour water from the aquarium (usually through a hose) - (do not forget to wash stones, shells, plants), clean the filter, pour the settled water (prepared in advance) - and that’s it! fish back.

Eugene

Completely all the water in the aquarium can not be replaced. This can kill the fish: launching it into clean (new) water, you break the microflora that was in the aquarium before the change of water.
If the aquarium contains adult fish, then when changing the water, only one-third is updated, and not more than once a week. For others, 1/5 - no more than once a month.
When the fish is young, the water needs to be changed more often, because in the aquarium a lot of organic matter (decomposition products) accumulates, which “presses” on the growth of the fish. If water replacement does not occur, then the fish may remain the same size as it was launched into the aquarium. Pour water should be the same temperature as in the aquarium.
Complete replacement of water in an aquarium can be successful with the observance of two rules: maintaining the temperature plus treating the water with preparations that create the initial micro flora.
Be sure to change the water in the aquarium if it began to smell. The reason for this can serve as excess food, which is clogged in the ground.
To care for the aquarium, we need a bucket, a regular or special hose with a nozzle-siphon (the hose is better to use transparent PVC, ordinary rubber can release unwanted components into the water, and the rubber quickly ages and becomes unusable). You also need a special glass scraper and possibly scissors. Scissors will be needed if necessary to cut overgrown plants, although many aquarists simply pick them off with their hands. But the main working tools are still a hose and a bucket.
Probably everyone saw how drivers with a hose poured gas from the tank? It's very simple - the hose is thrust into the tank (in our case, the aquarium), the other end is taken into the mouth and the liquid is gently sucked. The main trick in this procedure is to have time to put the end of the hose in the bucket before you take a sip of water. After a little practice, this is quite easy and simple, and the water happily murmurs from the aquarium into the exposed vessel. Of course, the bucket must stand below the water level in the aquarium, otherwise it will not work. You can do otherwise - the hose is completely heated in the aquarium, completely filled with water, then the ends of the hose are gently pinched, one end is transferred to the bucket and released there. Even if a small amount of air bubbles remain in the hose - it is not scary. They will make the flow of water. In addition, various devices facilitating this procedure are on sale - hoses with a rubber bulb (a valve allowing water only in one direction is built into it) or even special electric siphons on batteries. But in terms of simplicity and cheapness, the usual hose is most convenient! One remark, you should not try to take a hose of too large a diameter, for a thorough cleaning of an aquarium a hose with a diameter of 10-15mm is best, no more. Thicker hoses are convenient only when replacing a large amount of water at once, it is inconvenient to clean with their help - as long as you bring the end of the hose to a pile of dirt at the bottom, the bucket has time to be filled.
So, the water poured into the bucket, what to do next? Again, nothing complicated - you lower the other end deeper into the aquarium (it is better to stick your hand in the water, otherwise the hose is too difficult to send to the right places) and start to drive them in places of accumulation of dirt or remnants of undernourished food. I just want to warn you - the flow of water turns out to be very strong and can begin to suck the sand from the bottom, and an unwary or too curious fish can also tighten. To weaken a little the flow at the end of the hose is often dressed funnel. This greatly simplifies the cleaning procedure, and the sand remains in the aquarium, and does not migrate all into the bucket.

Mishgun

Water must be defended, to be at room temperature. There should be a tube of small diameter and long, centimeters 60-80. Rubber and whether another bending. Mini hose. You lower one end into the aquarium, take the other into your mouth, draw yourself in a little, so that the water pours through it into some container. And driving it along the bottom, you collect all the garbage, waste, etc. in this way. Then you pour it to the level of the separated water. I do this once a week, if the bottom is very dirty and muddy water. I have cichlomas, from which water is often polluted. And if you have gupii, malyanesii or others, it is not often to do it. some 2 times a month so clean. But to completely change the water and rinse everything, stones, shells and everything that is there is not often. Who once in 3-4 months, who less. My neighbor once in half a year. The fact is that fish have been acclimated in this water, and if they are in another, then they get used to it badly, they get sick. But even if you change it completely, then you need to take some water from the aquarium, clean, in order to change all the water completely, pour in this a little, so that the fish feel comfortable, and they are not completely in other water. If there are new stones and shells, they should be boiled with powder, rinsed well in running water and boil for about an hour in plain, without powder. And in this way all the bacteria go away. But do not forget that on the stones and shells with time and the necessary bacteria appear. It is impossible without them, therefore careful washing of each pebble is also harmful sometimes. Start somikam stuck. They clean the glass well. Be sure to have a filter. This is also a necessary thing. I still do that. when I change the water completely, the fish swim in a small aquarium, and I heat the water in the aquarium to the desired temperature, only then I launch them. Good luck to you.

Gerda

The water in the aquarium should be completely changed as it is polluted, but the frequency should not be done either, since the inhabitants create their own environment and are not very good at its violation. In general, there are special devices to pump out water only from below, where the main dirt is collected :)

Pavel Khvostantsev

I need to change every 2 weeks (although some of my friends change it once a year, probably)) cannot be completely changed, about 30% of old water must be left, this is due to the fact that they have their own microflora. Plus, as the evaporation needs to be constantly refilled.

O5 Zorka

Do not listen to anyone, just tap water must be defended in the bank for 3 days, for example, then you can at least change everything, honestly I say)
checked). Especially because you have such fish there). No, I honestly tell you, change everything though, only the water should be without chlorine, and that's it.

White chocolate

If you want to be helped! always write LITRAZH and population! It is necessary to change the water completely when doing all the cleaning of water ... but how can I not know what to say! You did not deign to write the displacement, but how can you give advice without it?
If you have a small aquas! it should be changed 1 time in 3.4 months ... if 100 liters or more ... then once a year, two ... or even 3!
P.S. Before you start fish you need to know everything about launching ... fish ... and so on, and then start!
One third need to change 1 per week!

Li Ka

Completely change the water in the aquarium in exceptional cases: when introducing unwanted microorganisms, the appearance of fungal mucus, rapid flowering of water that does not stop when the aquarium is darkened temporarily, and when the soil is very dirty. From the complete change of water plants suffer: there is discoloration and premature dying of the leaves. If the aquarium is biologically correctly populated, then plants, fish and bacteria in the soil and water can replace a good filter.
A common opinion among novice aquarists about the need for frequent water changes as a prerequisite for the normal maintenance of fish is deeply mistaken. Frequent changes of water in the aquarium can cause illness and even death of fish.
Regular replacement of 1/5 of the water in the aquarium is always desirable.
Read the link, everything is written there in detail => h ttp: // [link is blocked by the decision of the project administration]

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