How to change the water in the aquarium


Learning to do the replacement of water in the aquarium

An aquarium decorates every home, but is also often the pride of the inhabitants of the room. It is known that the aquarium has a positive effect on the mood and psychological state of a person. So, if you look at the fish swimming in it, there comes peace, calm and all the problems are relegated to the background. But here we should not forget that the aquarium requires and care. But how to care for the aquarium? How to clean the aquarium and replace the water in it so that neither the fish nor the vegetation will suffer? How many times do I need to change the fluid in it? Probably worth talking about this in more detail.

Tools for replacing aquarium water

Novice aquarists suggest that replacing water in an aquarium is accompanied by some kind of disorder spilled by water around the house and a huge waste of time. In fact, all this is not so. Changing the water in an aquarium is a simple process that does not take you long. In order to perform this simple procedure, you just need to have the knowledge and, of course, to acquire all the necessary tools that will be your permanent assistants. So let's start with what a person should know when starting the water replacement procedure. First of all, this is what all aquariums are divided into large and small. Those aquariums that do not exceed two hundred liters in their capacity are considered small, and those that exceed two hundred liters in volume are the second type. Let's start with the replacement of aquarium water in small objects.

  • ordinary bucket
  • crane, preferably ball
  • siphon, but always with a pear
  • hose, the size of which is 1-1.5 meters

The first replacement fluid in the aquarium

In order to perform the water change for the first time, you need to connect the siphon to the hose. This procedure is necessary to clean the soil in the aquarium. If there is no siphon, use the bottle, after cutting the bottom of it. With a pear or mouth, draw water until the entire hose is filled. Then open the tap and pour water into the bucket. This procedure can be repeated as many times as you need to replace. By the time such a procedure takes no more than fifteen minutes, but if a bucket without a spout, it will be a little more. When you do this for the first time, the skill will not be there yet, respectively, the time period may also increase. But this is only at the beginning, and then the whole procedure will take a little time. Aquarists know that changing the water in a large aquarium is easier than in a small one. Just need a longer hose so that it reaches the bathroom and then the bucket is no longer needed. By the way, for a large aquarium, you can use the nozzle, which easily connects to the faucet and fresh water will easily flow. If the water has managed to settle, then, accordingly, you will need a pump that helps to pump fluid into the aquarium.

Water change intervals

Beginner aquarists have questions about how often it is worth changing the water. But it is known that the complete replacement of fluid in an aquarium is extremely undesirable, as it can lead to various diseases and even to the death of fish. But it must be remembered that in an aquarium there should be such a biological aquatic environment that would be not only acceptable fish, but also had a positive effect on their reproduction. It is worth remembering a few rules that allow you to comply with all the necessary conditions for the normal existence of fish.

Water replacement rules:

  • The first two months should not replace the fluid at all
  • Subsequently, only 20 percent of water is replaced.
  • Partially change the fluid once a month
  • In an aquarium that is over a year old, the liquid must be changed at least once every two weeks.
  • Full replacement of the fluid is made only in emergency cases.

Compliance with these rules will preserve the necessary environment for the fish and will not allow them to die. It is impossible to break these rules, otherwise your fish will be doomed. But it is necessary not only to change the water, but also to clean the walls of the aquarium and at the same time not forget about the soil and algae.

How to prepare water for replacement

The main task of an aquarist is to properly prepare the water for replacement. Taking tap water is dangerous as it is chlorinated. To do this, use the following substances: chlorine and chloramine. If you familiarize yourself with the properties of these substances, you can find out that chlorine disappears quickly when it is settled. For this it is enough for him only twenty-four hours. But for chloramine one day is not enough. It takes at least seven days to remove this substance from the water. There are, of course, special preparations that help fight these substances. For example, aeration, which is very powerful in its effects. You can also use special reagents. This is, above all, dechlorinators.

Actions when using a dechlorinator:

  • dissolve dechlorinator in water
  • wait about three hours, until all the excess is evaporated.

By the way, these same dechlorinators can be purchased at any pet store. Sodium thiosulfate can also be used to remove bleach from water. It can be purchased at the pharmacy.

Replacing water and fish

Changing the aquarium water is easy, but you should not forget about the inhabitants. Fish every time there is a change of water, are under stress. Therefore, every week it is better to perform the procedures to which they gradually become accustomed and already perceive them calmly over time. This applies to any type of aquarium, regardless of size: small or large. If you keep a constant eye on the aquarium, you often do not have to change the water. Do not forget to take care of the general condition of the fish dwelling. So, it is worth changing the algae that grow in the aquarium, because they pollute the walls. It takes care of other plants that need not only to be changed as needed, but also to cut the leaves. To add additional water, but how much it can be added, is decided in each case separately. Do not forget about the gravel, which is also cleaned or changed. You can use a filter for water purification, but often this does not affect the conditions of the aquarium. But the main thing is not only to change the water, but to ensure that the lid in the aquarium is always closed. Then the water will not be so quickly polluted and it will not have to be changed frequently.

Video on how to replace the water and clean the aquarium:

How to change the water in a small aquarium :: how to care for fish in a small aquarium :: Aquarium fish

How to change the water in a small aquarium

Mini-aquariums - an attractive interior decoration. But unlike large tanks, equipped with all necessary equipment, there are some problems with care. If you follow the basic rules, including the replacement of water, you can avoid the flowering of the aquarium and create fairly tolerable conditions for the fish.

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You will need

  • - soft distilled water;
  • - net capacity;
  • - bucket;
  • - scraper.


1. It is believed that a small aquarium is easier to clean than a large one. However, this is the first misconception of inexperienced aquarists. It requires more frequent replacement of water, because the products of decomposition of fish waste are accumulated here most of all. In addition, intensive plant growth can cause a lot of trouble.

2. The water in a small aquarium should not be completely changed. It is enough to replace up to 1/5 of the total volume. This should be done quite often - once every 3-4 days.

3. Replacement water should only be soft, room temperature, so you should have a constant supply. Only tap water from clean dishes that should be used only for this purpose. It is necessary to defend the liquid for at least three days.

4. Replacing water in a small aquarium is not difficult. Calculate the required quantity for replacement. For example, in an aquarium with a capacity of 10 liters, it is necessary to change 2 liters (1/5 of the total volume).

5. Scoop out the required amount of water with a special scoop with a long handle. Scrub the walls of the aquarium and add fresh soft water. Then collect water in a clean dish and leave it to stand until the next procedure.

6. The water in the mini-tanks evaporates very quickly. Check its level regularly and top up if necessary.

7. Fully change the water in the aquarium should be as rare as possible, because it violates the biological equilibrium. However, this must be done once a year to transplant plants and clean the walls of the aquarium and filter.

8. To replace the water completely, remove the fish and place them in a jar for a while. Drain fluid with a hose. Remove excess algae. Clean the rocks and walls of the aquarium.

9. Then pour the settled water. Add bacteria and let the aquarium stand for a couple of days, then run the fish into it.


For dwelling in a small space, choose guppies, gourami and tetra. These fish feel pretty good in mini-aquariums. Also in the pond you can settle a cockerel, neons look beautiful. If the fish have grown to a rather large size, they need to be deposited in a larger tank.

Helpful advice

Very impressive look and feel good in a small aquarium, not only fish, but also other marine and freshwater inhabitants, such as shrimp.

Full replacement of water in the aquarium

Complete replacement of water in an aquarium is extremely undesirable, so it should be carried out only according to a special need - for example, if the aquarium needs to be repaired or disinfected.

In order to drain all the water, prepare a bailout, where you need to catch all the fish - it will become a temporary aquarium for them. If there is no spare aquarium, you can use a bucket or basin. In case there are a lot of small fish, make them the right aeration.

If possible, all plants are also removed from the aquarium. If the reason for the complete replacement lies in plant diseases, then they need to be disposed of, and after changing the water, plant others.

Once you have removed all the fish and plants, you can begin to drain the aquarium. Take a bucket or basin, which will pour water, bring it to the aquarium. To complete the replacement of water in the aquarium, first drain all the old water with a hose into a basin or bucket.

As soon as the aquarium is empty, it must be washed, sanitized and dried, and then filled with new water. Remember that after that the ecosystem should be normalized and the balance should be adjusted, therefore in the first 2-3 days a bacterial outbreak will occur, which will pass by itself. The water will grow cloudy, but as soon as it becomes transparent again, you can plant the plants, and it is better to start the fish in 7-9 days.

Remember that to abuse the full replacement of water is not worth it. If, for example, one fish died, this is not a reason for panic; if several of them are sick, then they need to be transplanted and tried to cure; and only if there is an outbreak of any infection, and drugs do not help, then you need to change the ecological environment, that is, water.

Replacing the water in an aquarium is sometimes considered the most effective tool in the fight against bacteria, because they do not react to drugs due to their protective mechanism. But still, before changing the water, think more than once - this is a huge stress for fish.

To change the water in the aquarium, instead of a hose, you can use a vacuum or electric pump. The simplest device is a siphon, which consists of a narrow tube and a cylinder. With its help you can clean the bottom and walls of the aquarium from the plaque and food debris.

Electric pumps have recently become quite popular, but they are used to pump water from small containers, and in other cases it is better to use a regular siphon.

❶ How to change the water in the aquarium fish :: how to change the water in the aquarium with fish :: Care and education

How to change the water the fish in the aquarium

The quality of water directly affects the health of fish and other inhabitants of the aquarium. You need to change it several times a month, each time topping up a small part. Water from the tap must be defended, and only after that it can be planted algae and underwater plants, as well as run your pets.

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You will need

  • - capacity for water;
  • -siphon nozzle or plastic tube with a diameter of 1-1.5 centimeters;
  • - additives to neutralize harmful substances (optional).


1. Get the right amount of water and defend it for at least 5-7 days. In the event that time is tight, after 1-2 days, filter the water through activated charcoal or boil for 10 minutes. However, you must remember that in the process of boiling water loses oxygen and it must be aerated. Defend water only in an enamel or glass container (the enamel must be intact). It is undesirable, but still you can use plastic bottles to stand on them. Put the water in a place where the sun will not fall on it.

2. If there is soil in your tank, drain off some of the old water using a special siphon nozzle. Otherwise, you can also use a plastic tube of small diameter (1-1.5 centimeters). At the end of the tube, dipped into the water, be sure to wear gauze so that the fish do not suck into it. Do not forget about the walls of the aquarium, if they are very dirty, you must clean them before changing the water. Water replenishment is carried out only partially, at a time you can change no more than 1 / 3-1 / 5 of the volume of the aquarium. You should carry out a complete change of water only in extreme cases, such as: the appearance of fungal mucus, entry of unwanted microorganisms, high soil contamination, etc.

3. To fill the aquarium, defend the water for at least 5 days, then pour the prepared it into the aquarium, plant the plants and run the fish. If you want to speed up the establishment of a normal environment, add a little water and soil to it from an already established, safe aquarium in which there is a ready-made complex of microorganisms. If desired, you can purchase special supplements that neutralize harmful substances in the store; you will not need to defend water when using them.


Do not overfeed the fish, it is the erroneous feeding that often causes damage to the environment in the aquarium.

Helpful advice

In order to check whether the water in the aquarium is good or not, inhale some air from its surface. The smell should be light and unobtrusive. Odor impurities indicate that adverse processes are occurring in the aquarium. It is optimal to refill water once a week.

How to clean and wash the aquarium: the rules, methods, video examples


In this topic I will try to briefly describe the process of general cleaning of the aquarium world. The point is not tricky !!! But before this event, I think, it would not be superfluous to find out: how to do it correctly, find out how often you need to wash the aquarium, what to wash, sequence of actions, etc.

You need to start a conversation with the fact that there is a big difference between washing an aquarium when it is purchased and a planned cleaning of an already established aquarium or in case of emergency. Therefore, we divide the article into these three components.

Washing and cleaning a new - purchased aquarium

Before you install and populate a new aquarium, you must rinse it out or rinse it out. This is due to the fact that, like any product - the aquarium does not know where it was before the purchase, it is not known who touched it and what happened to it.

For this, we carry an aquarium in the bath. I recommend to prepare a place in advance: prepare clean rags or towels, prepare a surface where you can put a washed aquarium, sponge and soda. The fact is that even a small aquarium is a rather weighty, glass-clumsy thing, and when it becomes wet, then in addition to everything, it also becomes slippery. In this state, the aquarium is not very convenient to turn, raise, carry out other manipulations.

Having prepared everything, put the aquarium in the bath and rinse it, preferably with hot water. We take baking soda and kitchen sponge for washing dishes and carefully but gently wash the aquarium with soda (like jars before seaming).

Well, and then everything should be thoroughly washed several times. If the aquarium allows, then gently turn it over on its side and use a shower spray to flush everything.


After we get the aquarium out of the bath and put it on a previously prepared surface, I recommend using sticks or towels in order to prevent the aquarium from slipping out of my hands. May need the help of a second person.

And now, the aquarium is ready for further installation, which you can read HERE.


- the aquarium can be washed and cleaned with any chemistry: soap, homeostos, comet. However, you should understand that the more "vigorous" the chemistry, the harder it is to wash it. Chemistry residues are not allowed. Since the new aquarium does not need to be thoroughly cleaned, it is not worth washing it in several times and washing it with a variety of cleaning products.

- simultaneously with the new aquarium, wash immediately bought soil and decor. Thus, you facilitate your work. Грунт и декор моется горячей водой или обдается кипятком. Можно немного добавить жидкого мыло и промыть с ним.At the same time the soaped soil is thoroughly washed !!! It is worth mentioning that in this article, under the ground, I understand quartz, gravel, sand other "colored chips". Special substrates should not be washed.

- if you are the owner of a new large aquarium, then all of the above manipulations are carried out at the installation site. In this case, flush pumped out with a hose, it is better not to use chemistry.

Planned cleaning and washing aquarium

Planned and global cleaning of the aquarium is carried out by experienced aquarists. Perhaps the most important question here is how often do you need to do it? I hasten to happily inform you that often you do not need to completely wash the aquarium. This cleaning is carried out about once every 5 years. This period is strictly individual and depends on the number of fish and plants in the aquarium.

Planned cleaning of the aquarium is carried out more carefully than washing a new aquarium. Such an aquarium is washed with chemistry several times, growths are mechanically removed and shaken off, the aquarium is subjected to heat treatment. After washing such an aquarium, it is advisable to dry for at least a day.

Wash and clean the aquarium in emergency situations - after illness and treatment of fish

Disinfection Aquarium

Unfortunately, it happens that an infection gets into an aquarium. As a result, the fish get sick and need treatment, and the aquarium needs total disinfection.

In such cases, a simple sink will not do. Infectious aquariums are poured daily with disinfectants to the brim. The easiest way to fill the aquarium with bleach or other household disinfectants. Pay attention - DISINFECTING MEANS !!! Not all household chemicals have disinfectant properties, read the instructions for the tool.

Recommend to use: potassium permanganate solution, chloramine solution, formalin solution, bleach solution, hydrochloric or sulfuric acid solution.

When mycobacteriosis is recommended to fill the aquariums with washing powder at the rate of a pound of powder per 30 liters of water.

In addition, the entire aquarium inventory is subjected to heat treatment - boiling.

After disinfection, I also recommend putting the aquarium to dry for at least 24 hours.

Since some people in the "Aquarium Wash" put the concept of weekly cleaning of the aquarium, we will highlight this issue.

Weekly washing and cleaning of the aquarium

When cleaning the aquarium every week, the following procedure should be strictly followed:

1. Get the equipment: filter, aeration, thermostat. Everything is washed, put aside.

2. If necessary, the care and cutting of plants.

3. Clean the walls of the aquarium. Sponge or special scrapers wipers.

4. If necessary, siphon soil. It is not necessary to clean the soil weekly, especially if there are live plants in the aquarium.

5. Only after that the water is replaced: the old water is drained and freshly added is added.

6. Install the equipment back cleaned.

Do not forget to clean the aquarium cover and the lamps from the inside at least once a month.

After all the manipulations, the aquarium is wiped with a dry cloth, stains can be removed with a window cleaner.

Observing the above simple rules the process of washing an aquarium will not be difficult and tedious, and the result will be as efficient as possible.

Useful video, how to clean and wash the aquarium

How to change the water in the aquarium ???


I see how many people - so many opinions. In my opinion you are the first time, filling the aquarium, brought some infection. Therefore, put the fish in a jar with separated water (at least 24 hours). Just see that they do not suffocate there. If there are many fish, it is better to take a few cans. Fish in banks may suffer from lack of oxygen, but they cannot go blind there. It is a myth. Then pour the aquarium, otdraivayte it with hot water and soap, rinse thoroughly with hot water without soap. Then fill it with cold water, or let cold water let it stand. At the bottom of the poured coarse washed sand and pebbles, plant algae, run the snails. And only then run the fish. And in the future, all the water in the aquarium does not need to be changed, only once every two weeks, collect the accumulated dirt from the bottom of the tank and add the required amount of distilled water instead of evaporated and removed along with the dirt. In aquarium, after some time, a biological balance must be established and it will work as a closed biosystem. True, this applies to aquariums of 80 liters or more.


1. 3 days before the start, infuse tap water (for bleaching powder to evaporate)
2. you need to catch fish with a net or net and place it in a jar.
3. Then take out the water, rinse them and put them in jars with fish (so that the fish in the bank will not die)
4. wash filter
5. Take out all large things from the aquarium (shells, stones, pink decorations)
if there is a feeder, it is also necessary to rinse it thoroughly, since the sun's rays are now hot in the aquarium and it “blooms” (ie, brown wood is formed on the glass)
6.Color all the bulky water in the bath or sink
rinse the stones through a durshlak or a sieve. old or dirty sand or stones can be thrown away, then bought in the store are new and placed in an aquarium (but the store filler for the bottom should be washed)
7. There is dirt or "mold" on the walls of the aquarium.
8.Rinse the aquarium from the soap.
9.In a clean aquarium, place washed stones (soil or sand) with this large items.
10.If there is a shortening of water on the bottom, it is also necessary to fix.
11. Pour into the aquarium already clean water.
12. Place and turn on the compressor or filter.
13.If you poured into the jar where there is all this fish time:
a) -pure water, it is already worth pouring the whole bottle of water and fish into the aquarium
b) -dirty water from the aquarium, it is already necessary to substitute a net or a sieve pouring dirty water through a sieve or a net, it is necessary in a separate bowl or sink. that is, so that dirty water (from a dirty unwashed aquarium) does not get into a clean aquarium.
14.If you have filtered and defended the water, you should not wait 24 hours to place fish there (to say that when a fish spends a long time in the bank it can be blind because the bank is round!
15. After washing the aquarium, feed the fish.


My mother-in-law changes the water like this: it takes a tube, slightly pulls the air in and the water will flow like a vacuum cleaner removes all the garbage, greens and waste products of your fish !! ! And the fish are not afraid of it !! !
Then pour clean, separated water in a thin stream !!! !
good luck !!!!

Konstantin Shaly

Water in aqua does not change, and 10% per week, or 30% per month, is substituted for beginners. And the white fluff is from peri-abundance of feed, it is rotten. You didn’t complete the aqua launch, planted the fish and began to feed it, therefore, and dregs. Stop feeding, collect decaying organic matter from the bottom with a siphon and the balance will gradually establish itself. Yes, and stop turning off the filter at night, it should work continuously, otherwise it does not make sense.

Elena Gabrielyan

Water for substitution should be fresh from the tap only to defend it should be no less than a day (preferably 2 days) for the volatilization of chlorine. It is impossible to change the water completely. By this you will make a complete restart of the aquarium and disrupt the biological balance, which will have a very bad effect on its inhabitants. It is necessary to substitute 1/3 of the volume of water with a thorough siphon of the runta 1 time per week. Mud and fluff in the aquarium from the feed - do not feed the fish for 2 - 3 days (they will survive), do not turn off the filter, biological balance will be established and the water will become transparent.


Already nothing to answer, the last two answers all said. The only thing is to monitor the water temperature when refilling, first bring it to the temperature of the water in the aquarium, otherwise there may be an outbreak of diseases in fish.

How often should I change the water in the aquarium? and how often should I clean it completely? volume 50 liters

Katya Karishkina

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. After two or three months, the emerging aquatic habitat in the aquarium will enter the youth stage. From this point until the complete reorganization of the aquarium, it is necessary to begin again to replace 1/5 of the volume of water once every 10 to 15 days, or monthly. It is as if the inhabitants of the aquarium do not need such a renewal of the environment, but the habitat requires it to prolong youth and maturity.


When the medium in the aquarium has stabilized, only partial replacements of no more than 20% of water every two to three weeks are made. But the aquarium lid should be thick enough so that the water does not evaporate so quickly. if the water evaporates quickly, it is better to change the water more often, so that the hardness does not increase.
I clean the aquarium after about three or four cleaning filters, about once every six weeks. Cleaning is the "sucking" of the soil through a tube (such a soil cleaner is sold). The shit is washed out, and the gravel remains.
If you frequently carry out a complete replacement of water and a thorough cleaning, then a stable environment will be disturbed each time and the aquarium will constantly require these procedures. Therefore, if the water often becomes cloudy, it is necessary, first, to check whether the filter performance is sufficient, and secondly, to colonize the aquarium with special bacteria (funds are sold to accelerate the maturation of the water).
Well, the aquarium in 50l is too small, IMHO it is better to put at least 100 liters. Then the environment in it will be more stable and less dependent on external factors. And do not overfeed the fish. and sometimes give them "fasting days" for about a week.

Changing the water in the aquarium and cleaning.