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Why does the water grow dirty in the aquarium and stink

maintenance, care, compatibility

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.

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 in order to speed up the process of restoring biological balance, it is recommended to add water from an 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.

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The aquarium is not only an interior decoration, but first and foremost an ecosystem that lives according to the laws common to all ecosystems. It is stable when there is a biological and chemical equilibrium in it.

An imbalance immediately affects the appearance of the aquarium, and primarily the quality of the water.

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Turbidity in the aquarium is usually caused by the massive development of various bacteria. Where do bacteria come from?

They, like other microbes, enter the aquarium with fish and plants. Their source can also be soil, fish food and even air with which water is in contact. A certain number of bacteria is always present in each of the elements of the ecosystem.

In a certain amount, they are harmless to other inhabitants of the aquarium. At the same time the water remains clean and clear. With the mass reproduction of bacteria, you will definitely encounter two or three days after filling the aquarium with fresh water.

This is due to the fact that in the absence of a sufficient number of other organisms, bacteria begin to multiply rapidly. Outwardly, it looks like a light whitish or nacreous homogeneous dregs.

The process of reproduction of bacteria goes faster if there are plants and soil in the aquarium.


After another 3-5 days, the clouding disappears. This is due to the appearance of ciliates in the aquarium water, which are intensively eaten by bacteria.

There comes a moment of equilibrium of the ecosystem. From this point on, fish can be settled in the aquarium.

Plants need to be taken from an aquarium with healthy inhabitants.


The clouding of the water in an aquarium where there are already fish can be caused by an organic slurry. The suspension is formed from the waste products of fish and plants, as well as improper feeding and an excess of dry food.

To control the suspension, aquarium filters are used, including biological ones, in which organics are actively absorbed by bacteria living on the filter material. Mandatory measures are also cleaning the bottom, removal of dead parts of plants, dead organisms, excreta.

The rapid turbidity of the water in an aquarium with living fish can be a manifestation of an imbalance and may be the first symptom of the disease of the entire ecosystem. For example, precede the blooming of water.

In this case, the aquarium has a large volume, frequent full change of water in it is impractical. It is easier to restore biological balance by adjusting the light mode and replacing only part of the water.

In large aquariums, biological balance is easier to maintain than in small ones, but it lasts longer. Branching crustaceans (daphnias, moinas, basmins, etc.), which feed on bacteria, are good feeds for fish are good sinkers of dregs. A mandatory equilibrium factor should be considered aeration and filtration of water.

Filters should be cleaned regularly.

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