Aquarium

The water in the aquarium dimmed on the second day

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Why does the water quickly grow turbid?

Muddy water in an aquarium with fish is perhaps the most common problem that concerns both beginners and experienced aquarists. Through trial and error, we have to figure out why muddy water appeared so quickly. The causes of this phenomenon can be different, ranging from a bacterial outbreak, improper feeding and irregular water renewal. A number of factors may also be the source of this problem. When the elimination or elimination of the causative agent of water turbidity in an aquarium occurs quickly, then the biological balance in the water is fully restored.

Sometimes this trouble provokes the death of fish, plants and invisible microorganisms. The first thing to do is to find out why the water becomes cloudy quickly. The second is to gradually eliminate the shortcomings.

Causes of Aquarium Water Turbidity

Why is the aquarium water quickly dimmed if the tank is equipped with a filter? The main problem is that on the very first day of the launch of the aquarium there is no holistic and permanent biological environment. The so-called "bacterial explosion" is caused by an active increase in the number of unicellular microorganisms that are constantly multiplying. In this case, the fish should not be settled, it is better to do it on another day. When microflora equilibrates in the tank, then the water will become crystal clear. Nothing serious needs to be done - this sediment will pass by itself. If you decide to change the water - it will again become muddy and unfit for life.

For 4-7 days the aquatic environment is fully restored, you can run plants and fish into it. To speed up the process, you can add water after the old aquarium with "residential" water.

Another common problem with the rapid turbidity of water in an aquarium is poor filtration of the reservoir. It should be well thought out system of purification, and this should be done quickly, until the young fish and did not have time to get used to a new house. A bad filter does not allow bits of dirt, feces, food debris, provoking the formation of decomposition products. Such rotten water constantly stinks and can cause diseases.

Watch a video about filtering water in an aquarium.

Why still water quickly becomes cloudy? If it has become an unpleasant green color, dimmed in a short time - it means that microscopic blue-green algae develop in it, which lead to the flowering of the reservoir. With good development of organic and strong light, they make themselves felt on the fifth day. When the light is not enough, cyanobacteria will acquire a brown color and begin to rot. Green color of the liquid with muddy, unpleasant smell - signs of growth of blue-green algae.


Aquarium water turbidity: action

If frequent water changes, the growth of bacteria and algae provoked the appearance of muddy water in the aquarium, some steps should be taken to eliminate the problem.

  1. If your aquarium is overpopulated, place the fish in different tanks, where they would be comfortable and spacious.
  2. If there is an excess of light, shade the aquarium by setting it in a secluded corner where strong lighting does not go.
  3. If the water becomes cloudy the next day after the first feeding, make a bottom siphon and feed the fish in small portions.
  4. Settle snails and fish in an aquarium that eat leftover food, clean glass and water in a tank. After a few days, the water will become free of dirt, and will not require additional replacement.


Wrong settlement of fish as a reason for the rapid turbidity of water

Why 2-3 days after the settlement of fish water became muddy? The fact is that for every one liter of water in the tank it is required to settle only one medium fish. If you run more pets, there will be problems with the pollution of the "house". Some fish plow the ground, and if there are many such individuals, it will turn into an underwater hurricane. Immediately move the fish in different aquariums, provide enough space for them. It is also important that they have enough oxygen, shelters and plants. In poor water oxygen to the fish can get sick.

In the aquarium with proper care and the right equipment, the water on the second day will not deteriorate. After running the fish, make sure that it adapts to the new environment. For 3 liters of water it is necessary to settle the fish size of 3-5 cm.

If the water is cloudy, you can use drugs that purify water from turbidity and dirt. After using them, water changes in the aquarium are not required for a few more days. They connect all the small particles that spoil the water until they fall into the filter. The next day, the entire bacterial cloud, small algae settle on the filter sponge, after which they can be removed.

These are the drugs: JBL Clearol, JBL Clynol, Seachem Clarity, Sera Aquaria Clear.

Watch a video about water changes.

How to change the aquarium water?

Full replacement of water is required only in the rarest cases, for example, with general quarantine or water poisoning. Why not do this procedure often? Because the day after the complete substitution, you will notice how the water turned cloudy again. A significant loss of its volume is stress for all inhabitants of the reservoir. Even during the death of some fish do not replace the water. But there are a number of recommendations, after studying which it is possible to understand why substitutions are necessary.

  • Substitutions are necessary after the introduction of pathogenic microorganisms;
  • Replacements are required after visible flowering of the reservoir;
  • Urgent water changes are necessary when a fungal mucus is detected;
  • Refresh water is required due to severe soil contamination.

You can add water to the tank as it evaporates, but not more than 20-30% of the total volume. It is best to update 1/5 of the aquarium once a week. After the procedure, the biocenosis will recover in 2 days. With the replacement of water cleaned the glass from plaque, remove debris from the bottom, clean snags and decorations.

It is better to plan a water change for both small and large reservoirs in advance. Type in a glass tank water from the tap, and leave it for a few days, covered with gauze. Chlorine and gas will evaporate, the liquid will be safe for fish. And it should be remembered that in the first week of operation of the aquarium the water is not changed until an ecosystem is formed in it.

Why does the water in the aquarium muddy

The clouding of an aquarium is one of the most common problems that even the most avid and experienced aquarists face. Only a few know why the water in the aquarium becomes cloudy. The reasons for such trouble can be several. This is a bacterial outbreak, and a rare replacement of water, and improper feeding of the inhabitants of this home "reservoir." There may be other causes.

In some cases, it is enough to eliminate or eliminate the causes of turbidity in the aquarium so that the balance is fully restored. However, often this phenomenon leads to the fact that fish and plants are dying in muddy water. First of all, the "decorative fish farmer" needs to find out the cause of flowering or turbidity of water. Any action should be taken only after this.

Water in an aquarium quickly becomes turbid: what reasons can?

Turbid water in an aquarium is not uncommon when starting a home pond. This is due to the fact that a bacterial outbreak occurs, which is caused by the active reproduction of single-celled organisms in water. That is why the settlement of fish is better to postpone for a while. You need to wait some time to establish a balance in the water, and it will become transparent. If you change the water, then again there will be a blurred water in the aquarium.

If the water in the new aquarium dims, it should take at least 5-7 days. Only after that you can safely run the fish. During this time, biological balance will be restored. To speed up this process, you can add some water from the old aquarium.

Often, the aquarium becomes turbid due to overfeeding the fish. Water spoils quite quickly if food is not completely eaten by the inhabitants of the mini-reservoir. It settles at the bottom of the tank and can spoil the life-giving moisture. This is another common cause of this problem.

Water turbidity in the aquarium can be expected as a result of poor filtration of water. The cleaning system must be well thought out. This is especially important when there are many inhabitants in an aquarium. If the problem is not resolved in time, it can cause the fish to become poisoned with decay products. "Residents of the reservoir" of this relationship may not survive.

The problem of green and muddy water in an aquarium can be hidden in a microscopic alga, or more precisely in its rapid growth. If organic matter accumulates at the bottom or too much light is directed to the reservoir, then microscopic algae can actively grow. But when the lighting is not enough, the algae will turn brown and begin to rot. If the water in the aquarium quickly becomes cloudy and smells unpleasant, the root of the problem may lie in the growth of blue-green algae.

Aquarium dimmed: what to do?

If this trouble still happened, you need to determine why the water in the aquarium dimmed. Only the exact answer to this question will set the course for further action. If the root of the problem is hidden in the overpopulation of the aquarium, you need to reduce the number of its inhabitants or to increase filtration. If at the bottom the remnants of the uneaten food are deposited, the number of servings needs to be reduced or satted down with the bottom fish, which will eat up the remains.

If you can figure out why the water in the aquarium becomes cloudy, and the reason was an excess of light, you need to darken the aquarium. If the lighting is not enough, you need to add it. It is possible to halt the excessive growth of algae. To do this, snails or fish that feed on algae and excess vegetation will settle in the pond.

What else makes the water in the aquarium muddy? Due to low-power filtering system. A prerequisite for the preservation of biological balance and decent maintenance of the aquarium is the presence and normal operation of high-quality filters. If the aquarium is dimmed after all, you can add a special additive, which is sold in specialized stores. However, in most cases it is not possible to restore the balance in water.

To understand why the water in the aquariums becomes cloudy, you need to understand the reason for this process. However, it should be remembered that the water in the "pond" is always alive. Her condition is a consequence and the result of the interaction of a whole series of tiny creatures, therefore, certain conditions and time are needed for restoration. But hasty and incorrect decisions can lead to even greater destruction, so you need to act carefully.

Why does the water grow turbid in the aquarium?

Muddy water in the aquarium This is one of the most common problems that even experienced aquarists face. The reason for the violation of biological equilibrium can be a bacterial outbreak, improper feeding of fish, replacement of water in the aquarium and other factors. In some cases, it is enough to eliminate the cause, and after a few days the balance will be restored. But sometimes the turbidity of the water in the aquarium can lead to the death of fish and plants. In any case, first of all it is necessary to establish why water grows turbid or blooms in the aquarium. And, only on the basis of the causes of violations, will it be possible to take any action.

Why does the water grow turbid in the aquarium?

When starting the aquarium for several days, there is a bacterial outbreak caused by excessive multiplication of single-celled organisms. Therefore, it is not recommended to colonize the fish immediately after launch. It is necessary to wait until the balance is established and the water becomes transparent. At the same time, changing water is also not worth it. A change of water will only cause it to become cloudy again. Usually, fish are settled in 5-7 days, and to speed up the process of restoring biological balance, it is recommended to add water from the old aquarium.

Turbid water in the aquarium can be the result of overfeeding the fish. If the food is not eaten completely, and settles at the bottom, the water will quickly deteriorate.

Also, muddy water in the aquarium may indicate poor filtration. With a large number of fish, you need to think very well about the water purification system, otherwise very soon the fish will start poisoning with decay products, which can cause the death of the inhabitants of the aquarium.

Why is the water in the aquarium green?

The flowering of water is due to the rapid growth of microscopic algae. This may be caused by an excess of light or accumulation of organic matter at the bottom. With a lack of lighting algae begin to rot and turn brown. If the water in the aquarium is clouded and smells, then the cause may be the reproduction of blue-green algae.

What to do if in the aquarium muddy water?

First of all, of course, you need to eliminate the cause of turbidity. If the problem lies in overpopulation of the aquarium, then you need to either increase water filtration or reduce the number of fish. If at the bottom of accumulated remnants of food, you need to reduce portions, and you can also settle the bottom fish that eat food settled on the ground. When flowering you need to darken the aquarium, if there is an excess of lighting, or vice versa - to establish a more powerful lighting system with a lack of light. To prevent excessive algae growth, it is recommended to make fish or snails that eat excess vegetation. It is also worth paying attention to the filtering system. The presence of good filters is a prerequisite for the maintenance of the aquarium and the preservation of biological equilibrium. Sometimes it is recommended to add special additives to the water, but most aquarists do not support this method of restoring balance. In any case, it is necessary to understand that the living water in an aquarium is the result of the interaction of many living beings, therefore, time and certain conditions are necessary to restore balance. Incorrect actions can lead to even greater disruption, so the main task is to create conditions for stabilizing the balance.

How often do I need to change the water in the aquarium?

Proper replacement of water in an aquarium plays an important role in maintaining balance. A common mistake is to replace too often or replace large amounts of water. With a small litrazh such errors can result in the death of the fish. Before you change the water in the aquarium, you need to check the water quality, acidity and temperature. With a large volume, it will take about 2 days to restore balance; with a small volume, water needs change very carefully. After the launch of the aquarium water can not be changed for 2-3 months, until equilibrium is established. Subsequently, every 15-30 days replace up to 1/5 of the total volume. With a good filtration system and a small amount of fish, water is changed less frequently and to a lesser extent. If you replace more than half of the water in the aquarium, then the whole formed environment, including fish, may die.

In order to avoid problems, it is worth taking care of the proper equipment, starting and settling the aquarium from the very beginning. If you follow all the rules, it will not be difficult to achieve and maintain biological balance, and caring for an aquarium will not cause problems.

The water in the aquarium dimmed, what to do?

Vika Sharov

With water after a start it becomes cloudy. Do not be afraid! This establishment of a biological regime, passes in 2-3 days. First, be sure to use live: kladofora spherical. Wait a week and then plant fish. And somewhere in 2-3 days you can throw out the plant and buy plastic plants. And these fish can put a flock of 5-6 pieces. It is possible to overpopulate an aquarium for several liters. This is usually determined by space. And if not the placer, get a little beautiful fish: neon. They contain a flock, for 1 piece 2 liters. And on your aquarium there may be an estate of 5 pieces. Gender difference: the male has a straight line and the female has a curved blue neon. and there are blue, black, red neons.

Divergent

Do not change the water in any way. That's when brightens (3-4 days), then the fish can be run. These are ciliates-shoes multiplied.
On the second question: Fish need oxygen. Then put the pump if there are no live plants.

Natalia

Buy a special liquid to brighten the aquarium. It is sold in pet stores. Water does not need to be changed, try to wait for two days, if it does not brighten, add this liquid, only a little (nothing will happen to the fish, consult the seller).

Natalia A.

So it should be at the start, your place in the auditorium, wait until the flash passes, you can darken, do not turn off the filter in any way, after a couple of days the water will clear itself. For barbs, they are flocks, the volume is small, although cherry heels can be no more, the plants are still desirable live and in your case purge. I do not advise you to pour any liquid, the volume is small and the biological balance is extremely unstable, learn to achieve in a natural way.

After replacing the water in the aquarium, 100% dimmed after 14 days why and how to fight?

User deleted

Water turbidity can occur for various reasons; to deal with these phenomena is not always easy. In the most benign case, the water becomes cloudy due to the fine particles of a pound suspended in it, for example, after carelessly pouring water into the aquarium. Such clouding does not have any unpleasant consequences and after a while disappears by itself when the turbidity settles to the bottom.
The water in the aquarium becomes cloudy with the appearance of a large number of putrefactive bacteria in it, which are very harmful not only for fish, but also for aquatic plants. The reason for the appearance of such bacteria is improper feeding and overly dense fish landing in the aquarium.For good filtration of water, coarse-grained, clean-washed river sand should be poured to the bottom of the aquarium, preferably in a dark color, 4-5 cm layer. Do not carry out a complete change of water in the aquarium, you only need to clean it periodically with a rubber (glass) tube dirt from the bottom and add fresh water of the same temperature. A properly equipped and well-contained aquarium can last for years without changing water. It establishes the so-called biological equilibrium. The norm of landing fish - 2 3 pieces the size of 3-5 cm for 1-3 liters of water.
Major troubles arise from improper feeding. First of all, dry feed should be abandoned: dry fish feed is rather bad, and water deteriorates very quickly. If you have to resort to dry food, then it should be given little by little and it should be watched that all food would be eaten immediately. Great help here are snails, willingly eating the remnants of food. A properly prepared ration must necessarily include live food. One of the best feed is the bloodworm. It should be given on the basis of the norm of 3-5 worms per day for each small fish of small size.
It is necessary to ensure that any food is eaten in 10-15 minutes: the constant presence of food at the bottom of the aquarium is unacceptable. Worm tubers are also good food, however they should be washed very thoroughly in clean water from dirt before giving to the fish. Cortera serves as an excellent food - a transparent floating larva of one of the mosquito species. She does not dig in the ground, she lives in the aquarium for a long time and is very eagerly eaten by fish. At home, enkhitrei worms are easily divorced in a small box with earth. Daphnids and cyclops serve as good food, which you can catch yourself in any kind of puddle with the help of a net from a dense nylon.
With a known experience and skill, you can feed the fish with raw raw meat, but this should be done with the greatest caution: the water from the meat spoils very quickly. If the water has become cloudy, then it is necessary to stop feeding for a few days: the bacteria will die, and the fish will not be harmed. And there is another rule: it is better not to feed than to feed. Under these conditions, the water in the aquarium will be transparent.
Many novice aquarists when cleaning a small capacity aquarium are completely replacing water in it, replanting fish and removing plants. At the same time fish are injured and plants spoil. Often you can hear the full disappointment statement: "The more often I change the water, the more it becomes cloudy." This is true.
In the newly equipped aquarium in the first few days the water may be muddy due to the strong reproduction of single-celled organisms. After the aquarium is prepared and filled with water, you should be patient and not be sewn up with its stocking. As a rule, on the second or third day, the water in the aquarium becomes muddy, as if a few drops of milk dripped into it, because after a complete replacement of water, microorganisms usually grow rapidly after a while; plants, and the water becomes cloudy, not from the weed particles, but from the infusion, the so-called "infusor turbidity" arises.
The rapid reproduction of bacteria can manifest itself in your aquarium every time you replace a large amount of water, and also in cases where you forget to remove the remnants of non-eaten feed from the aquarium in time ...

olga

The water becomes cloudy somewhere on the third day, since a new microflora is formed, maybe later. Did you have any separated water, or did you immediately fill it up? How well did you do the water change. Fish in this case can not immediately run. There are all sorts of nuances.

Marina

Maybe you have a small aquarium 10-20l, you have a lot of problems with it and often (1 time in 1-2 weeks) you need to change the water, the bigger the aquarium, the better, they completely change the water once a year, and during the year they simply drain it, Of course, not completely until the end, without replanting the fish, wipe the walls and pour new ones, and new fish should be held in a special solution for prevention before they are planted in the general aquarium. Zha and sunlight is bad for water, it blooms, everything was explained to you in detail, good luck

The water in the aquarium dimmed, what to do?

Anta

everything is normal, the process is proceeding as it should ... wait a few more days, the balance will be established a bit and the water will brighten itself - it will become transparent, then you can already try to start the first tenants, but it’s better to start immediately;)
P. with. water does not change in any case. Otherwise, consider everything from the beginning will begin ... and again a week to wait until the water dims, brightens ...

Arthur Boykov

Bacterial turbidity (as if milk was added to the water) is a stage of rapid development of various bacteria.
Outwardly, these processes are often manifested in the fact that the water becomes cloudy. An inexperienced aquarist is trying to rectify the situation by changing the water. However, water often becomes cloudy again. In order for the water in the aquarium to remain clean and transparent for a long time, and the fish to feel good in it, it is necessary that a biological "equilibrium" is established in the aquarium - a condition in which biological and chemical treatment results in animal and plant life products, as well as food debris manages to collapse and digest, without causing harm to the main population of the aquarium - fish. Each aquarium establishes its own biological "equilibrium", depending both on the volume of the vessel, and on the quantitative and qualitative composition of animals and plants; it also depends on the physical and chemical conditions in a given aquarium "
1. Remains of food and fish waste in the aquarium leads to the appearance of ammonium and / or ammonia.
2. Both ammonia and ammonium are oxidized by bacteria to nitrite.
3. Bacteria nitrite is processed into nitrate.
How much and who else should appear ... no one can exactly say mine.
Bacteria are not activated immediately, but try to make sure that the food is really there, and then they begin to multiply intensively, while simultaneously consuming oxygen and "making the water turbid," so to speak bacterial turbidity.
Subsequently, they all eat away ... part of the shortage of products dies, and some remains, but remains as much as is necessary to process what is. They added a fish ... added the number of bacteria, removed ... bacteria became less.
The plants in the aquarium (I can’t say for sure that everyone), starting from the third point, consume what is being produced (although it is still necessary to take into account that the plants just placed need time to adapt, and at that time they mostly live on their own domestic stocks, as well as the fact that plants need other macro and micro elements).
Muddy - green water, water blooms.
The color of blooming water is caused by the smallest algae floating in the water column.
The reasons are almost always the same: there is an excess of nutrients in the water for these algae and enough light.
Methods of "struggle" with water bloom:
1. Place a large number and different types of floating plants.
2. To bring daphnia, these algae for her tasty food, but daphnia will be very tasty food for fish:) ...
3. Completely darken the aquarium with something very dense, so that it does not penetrate into the aquarium at all a bit of light, while enhancing aeration in the aquarium. After three four days to open the aquarium, make a water change, as much as painlessly allows you to make the population of the aquarium, and gradually increase the amount of light and daylight in the aquarium (if there are aquarium plants).
Turbid water from the smallest particles "like dust".
What caused this suspension of the smallest particles and some methods of dealing with such turbidity:
1. It happens that the ground, as it were, is sawing because of its structure or composition, it was like that and I didn’t do anything, from the time everything sank to the bottom, the main thing is to give an opportunity to settle.
2. Too strong flow of the filter just breaks down what gets into it, and without letting these particles settle down, it carries on with the flow of water into the aquarium. Either reduce the flow from the filter, or increase the efficiency of the filtering fillers, well, either completely remove this filter ...

Sergey Lyulin

Everything is good. On the 4th day after pouring water into the new aquarium, alkaline balance begins to be established. This clouding will pass tomorrow or the day after tomorrow.
After this, it is advisable not to change the water in the aquarium, but only to replenish it.

Kristina

water is not necessary to change. The water is turbid, because bacteria multiply (if the aquarium is new). Fish until it is not necessary to sit down. Be patient for another 2-3 days and the water will become crystal clear. Water should not exceed 22 degrees, otherwise the water will bloom and will be cloudy. We had the same garbage with a new aquarium.

What to do if the water in the aquarium becomes cloudy?

Tatyana Litvinova

And why did you change the water completely. In no case should this be done. It is necessary to replace the weekly part of the water one third of the settled water with a siphon of the soil. Wash the filter in the aquarium water drained when changing (not under the tap!). Changing the water entirely, you break the biological balance in the aquarium, and as a result the water becomes cloudy. And fish may die as a result of such manipulations.
Now do nothing, the water itself will brighten after a while. And no longer change the water entirely. Do only water changes with a ground siphon. Try not to overfeed the fish, it is better not to feed, they will be healthier. And the water from excess feed will not suffer. Good luck.

Tanya

Water turbidity can occur for various reasons; to deal with these phenomena is not always easy. In the most benign case, the water becomes cloudy due to the fine particles of a pound suspended in it, for example, after carelessly pouring water into the aquarium. Such clouding does not have any unpleasant consequences and after a while disappears by itself when the turbidity settles to the bottom.
The water in the aquarium becomes cloudy with the appearance of a large number of putrefactive bacteria in it, which are very harmful not only for fish, but also for aquatic plants. The reason for the appearance of such bacteria is improper feeding and overly dense fish landing in the aquarium. For good filtration of water, coarse-grained, clean-washed river sand should be poured to the bottom of the aquarium, preferably in a dark color, 4-5 cm layer. Do not carry out a complete change of water in the aquarium, you only need to clean it periodically with a rubber (glass) tube dirt from the bottom and add fresh water of the same temperature. A properly equipped and well-contained aquarium can last for years without changing water. It establishes the so-called biological equilibrium. The norm of landing fish - 2 3 pieces the size of 3-5 cm for 1-3 liters of water.
Major troubles arise from improper feeding. First of all, dry feed should be abandoned: dry fish feed is rather bad, and water deteriorates very quickly. If you have to resort to dry food, then it should be given little by little and it should be watched that all food would be eaten immediately. Great help here are snails, willingly eating the remnants of food. A properly prepared ration must necessarily include live food. One of the best feed is the bloodworm. It should be given on the basis of the norm of 3-5 worms per day for each small fish of small size.
With a known experience and skill, you can feed the fish with raw raw meat, but this should be done with the greatest caution: the water from the meat spoils very quickly. If the water has become cloudy, then it is necessary to stop feeding for a few days: the bacteria will die, and the fish will not be harmed. And there is another rule: it is better not to feed than to feed. Under these conditions, the water in the aquarium will be transparent.
Many novice aquarists when cleaning a small capacity aquarium are completely replacing water in it, replanting fish and removing plants. At the same time fish are injured and plants spoil. Often you can hear the full disappointment statement: "The more often I change the water, the more it becomes cloudy." This is true.
In the newly equipped aquarium in the first few days the water may be muddy due to the strong reproduction of single-celled organisms. After the aquarium is prepared and filled with water, you should be patient and not be sewn up with its stocking. As a rule, on the second or third day, the water in the aquarium becomes muddy, as if a few drops of milk dripped into it, because after a complete replacement of water, microorganisms usually grow rapidly after a while; plants, and the water becomes cloudy, not from the weed particles, but from the infusion, the so-called "infusor turbidity" arises.
If you do not change the water to a new one, as many inexperienced aquarists do, fearing turbidity, then after a week or two, the bacterial dregs disappear and the water becomes crystal clear. This process can be accelerated by adding a small amount of water from the old to the water of the new aquarium.
In an overpopulated aquarium, cloudy water may occur, especially if there are few plants in it, and the water is not blown or filtered. In such an aquarium, accumulated metabolic products serve as a good nutrient medium for the mass reproduction of bacteria and unicellular organisms. In this case, you need to quickly precipitate extra fish. If the situation is not corrected in time, it can lead to the sickness and even mass death of fish, not to mention that such an aquarium looks ugly.

Why is the water in the aquarium muddy and stinks?

User deleted

In general, there are a lot of reasons why water will deteriorate ... Improper lighting too much food is thrown into the water by the absence of filters in an aquarium, bacteria, etc.
For the night, the aquarium should be well treated first, then cleaned with boiled salted boiling water, the whole grund is boiled well in salt water, the algae should be examined if they are not bright green, not damaged, see if they are black dots if there is easier to throw out and buy New to heal, knowledge is needed, and you, I assume, are new to this, fish should be fed no more than once every 3 days and the food that you feed should be eaten in a minute and not set on the bottom of the aquarium and rot ...
after treatment, water must be poured at least 24 hours in the distance ... at least ...
Go to the pet store buy AKUTAN, this is a blue liquid, add it to the water at the rate of a cap of 10 liters ... and then run the fish for 3 days, the water will have a slightly white turbid but within 3 days it will change ... and the aquarium should stand in a dark place but have a good daylight lamp ... and do not forget about the number of fish at the rate of 1 fish 3-5 liters of water Ie per 10 liters of water no more than 2-3 fish of average size ... if possible, there should be a filter pump water should circulate and clean constantly good Other filters have cells for adding coal to ceramics. Well, they will tell you about this at the pet store, and so good luck, and if you ask anything ...

Condorita

Apparently, either pour water not previously defended, or algae are bred there.
With algae can fight. There are water snails that devour them.
And be sure to plant a water in the water - a crochet - sold in the market. A plant that protects water from "dirt."

Helena

Perhaps the filter does not work well or something got started there that it is difficult to remove it just by changing the water. It can be algae (small ones at all) and then you need to buy in the pet store a means to combat such algae. Or just try again not just to change the water, but even boil the soil and boil over everything that you have installed in the aquarium

Anya

damn, well, what are you ?? ? Why change the water then ?? ? it is so necessary! You see, you probably planted the plants there, so from the plants of day 2, the water must grow cloudy, and then everything will pass !! ! and do not change the water so often !!!! it is generally very rarely changed, and the fish will die then ... everything is fine with your aquarium

Knopochka

maybe you have a lot of fish and the aquarium is small. 1 liter of water 1 fish about. Try boiling pebbles all, maybe there are bacteria that bred and multiply very good. quickly, water poured into the aquarium. but in general, the smaller the aquarium, the more worries with it !! ! It very often needs to be washed. but if it becomes cloudy in one day, then you need to look for the cause, and the fish do not die ???

* N *

In the aquarium, fish need oxygen, a water filter, and even the water does not like a lot of light (it starts to bloom).
If there are pebbles and shells, they should be boiled, water should be boiled and water should be poured and boiled again for 2 hours, the aquarium should be washed with soda, the plants should be washed thoroughly. Before you pour water into the aquarium, you need to defend the water for 3 days, then pour it into the aquarium, then put oxygen into the water and after 20 minutes you can let the fish.

User deleted

The tank should be at least 25 liters. Otherwise, it will not be an aquarium, but crap! There necessarily need a filter and pump (bubbles). Sunlight should not be on the aquarium. Fish should be fed 2-3 times a day in small portions. Water changes no more than 30% at a time. Immediately start the fish can not be! It is necessary to first establish a biobalance. (about 4-5 days). Generally dig a good internet! You probably first have fish, then an aquarium, then plants, and then food. all the way around!

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