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Why does the water in the aquarium darken?

maintenance, care, compatibility

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.

Why does the water in the aquarium grow muddy?: Start the aquarium; muddy water :: Aquarium fish.

Muddy water in an aquarium is a common problem that even experienced aquarists sometimes face. It can be fatal for your fish.

To avoid this, you need to understand the causes of this trouble and eliminate them.

The question “opened a pet store. Business is not going. What to do? “- 2 answers

An aquarium is a microworld where organisms appear and die. It consists of a fine interconnection of fish, plants and bacteria.
When you create a new aquarium in a few days there is a huge number of bacteria, excessively breeding in water. This leads to its turbidity.

This process is quite normal and natural. Before you run the fish in the aquarium with new water, you just need to wait a few days until it clears itself. Due to lack of food, most bacteria will become extinct, and the biological balance of water will normalize.

To change the water in this case is strictly prohibited, because it also becomes cloudy. It is best to add some water from the old aquarium, where the balance has long been established.

If this is not available, nothing terrible, the balance in the water itself is settled, it just takes more time for this.
Another cause of muddy water can be overfeeding fish. Excess feed, which your pets do not have time to eat, sink to the bottom and begin to rot. As a result, the water begins to deteriorate.

In such an environment, the inhabitants of the aquarium can not feel good, and their long stay in bad water will destroy.
When a large number of fish in the aquarium and, at the same time, poor filtration of water, there is its turbidity. The inhabitants of such an environment will certainly begin to poison the body with decay products, which will lead to their death.
The cause of muddy water can be algae. There is a certain species that, if overproduced, leads to a turbid environment in the aquarium and at the same time emits an unpleasant odor.

Another problem may be excessive light or accumulation of excess organic matter at the bottom, which stimulates the rapid growth of microscopic algae, and as a result water will bloom. It becomes opaque with a greenish tinge.

With a lack of light, the plants in the aquarium will turn brown and begin to rot, which will ruin the habitat of the fish and harm their health.

To deal with muddy water is not difficult, the main thing is to understand the causes of turbidity and follow certain rules in the future.
First you need to determine the cause of the turbidity of the water. If it consists in overpopulation of the aquarium, then it is necessary to strengthen the filtering or move some fish to another place.

If the reason is the accumulation of excess feed on the bottom, then you need to reduce the dose of food or purchase bottom fish that will eat up the settled food. If there is a problem with lighting, you need to darken the aquarium or enhance the light.

To prevent the rapid growth of algae, it is recommended to start fish or snails that eat plants. In order to maintain biological balance in an aquarium, it is imperative to have a good filter that matches the size of the water tank. You need to understand that in the aquarium the water is alive, and to maintain balance you need to maintain certain conditions.

It does not recommend the use of chemicals, they can lead to even greater environmental disturbance and will require a longer recovery.
In maintaining balance in water, its change plays an important role. After launching a new aquarium, it is not necessary to change the water for 2-3 months until the balance is improved. In the future, the water should be replaced 1-2 times a month.

At the same time merging only 1/5 of the total volume of the aquarium and adding as many new ones. If you change more than half, then the habitat is disturbed, which will lead to the death of the fish.

In small aquariums, water can be replaced less frequently, provided there is a good filter.

A properly equipped and properly maintained aquarium in which biological balance is maintained may not require changing water for a long time. The problem of water turbidity often occurs in novice aquarists, who believe that caring for fish is only in abundant and timely feeding.

1. The water becomes turbid due to small particles of soil that have been washed out of it, which are washed out during the careless filling of the aquarium with water. After they settle to the bottom, the water will again become clear. Do not replace water completely when it is not required.

Using a rubber or glass tube, periodically remove dirt accumulating on the bottom and add the required amount of fresh water, ensuring that its temperature coincides with the water in the aquarium.

2. Water may also become turbid in a new, newly equipped aquarium, due to the reproduction of single-celled organisms. This phenomenon is called “infusorial turbidity”.

Do not rush to settle an aquarium prepared and filled with water, wait a few days. Another harmless cause of turbidity – loosening of the soil by fish digging in it – is easily eliminated by placing a layer of thoroughly washed sand on the bottom.

3. The turbidity of the water can be caused by the appearance of a large number of putrefactive bacteria that are very harmful to fish and plants due to too high a concentration of fish in the aquarium or improper feeding. Follow one of the basic rules of aquarism: “It is better to underfeed than overfeed.”

4. If you forget to clean up the remnants of food and rotting plants in time, this can also provoke a rapid reproduction of bacteria. In addition, turbidity can be caused by poor filtration and blowing of water, as a result of which accumulation of metabolic products occurs in the aquarium, which serve as an ideal medium for mass reproduction and feeding of bacteria.

To avoid such consequences, squander excess fish and improve the filtration system.

Refuse dry feeds or give them a little and watch them to be eaten as soon as possible. Place in the aquarium snails, which are willing to clean up edible remains.

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 this 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.

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.

The causes of muddy water in an aquarium can be varied, and it is not as easy to deal with them as it seems at first glance.

  1. Turbidity can occur due to swimming in the pond of small particles of algae, solid organics and cyanobacteria. There is another unobtrusive reason – poor washing of the aquarium soil and inaccurate pouring water from a clean tank. This type of turbidity does not threaten the water and the fish, you can do nothing with it. After some time, the muddy part of the water will settle, or seep into the filter, remaining there. The formation of turbidity can provoke fish who love to plow the ground, but these actions for the reservoir are completely harmless.


  1. Turbid water in an aquarium can be caused by cichlids, goldfish and tail finch fish – their active movement in a reservoir is the cause of the resulting turbidity. If a filter is not installed in the tank, it will be difficult to clean the water.
  2. Often, muddy water appears after the first start of the aquarium, after the fresh water inlet. Nothing to do, in a day or two the sediment will fall to the ground and disappear. The mistake of novice aquarists is a partial or complete renewal of water, which is considered a gross error. When adding new water to a newly launched aquarium, the bacteria will become even more! If the aquarium is small, you can install a sponge filter that quickly cleans the pond.

Watch the video about the device and the operation of the internal filter.

  1. Malicious bacteria in an aquarium can also be causes of turbidity. When the water becomes green, then it’s time to draw conclusions – this is an unnatural color. Muddy and green water is formed due to overcrowding of the aquarium with fish or plants. That is, the aquarium fluid passes through the filter, but is not cleaned. The abundance of metabolic products provokes the formation of putrefactive microorganisms, ciliates and other unicellular. If ciliates are beneficial, the bacteria can harm the plants – they will start to rot. In order not to be surprised why fish and plants often get sick – watch the aquarium clean and tidy.

  1. Why still breed single-celled? Because you do not have time to clean the tank after heavy feeding. For aquarism it is better to underfeed than to feed. This rule will protect the fish from problems. After overfeeding again the water got cloudy – what to do? Arrange a pet unloading diet for a couple of days, the bacteria will die out, the water biobalance will be restored.

  1. Incorrectly installed decoration. Snags, plastic materials of poor quality dissolve in water, forming a muddy shade. If the scenery is new wooden, but untreated – they can be boiled or infused in salt solution. Plastic snags should be replaced with new ones.
  2. In the old, stagnant nursery with fish, sediment is formed due to “whiteness after fish treatment”, this is when drugs and purification chemistry for aquarium glass were used in the pond. Such substances have a number of side effects, they disrupt the biological equilibrium, neutralizing the favorable microflora.

Now we know the reasons why the water grows cloudy in the aquarium, and what to do in each case. However, there are general rules, without which it is impossible to completely eliminate the problem.

  1. Siphonte the ground in the aquarium. Open the filter, rinse and clean. Then add activated carbon to it – this needs to be done to absorb harmful substances. It is forbidden to make a complete replacement of water and washing the aquarium soil, otherwise the beneficial bacteria will die out and will not be able to process rot and algae.

See how to siphon the soil in the aquarium.

  1. In some cases, it is necessary to do an intensive aeration of the aquarium – when there are a lot of fish feed residues and a fasting day is not enough. Oxygen will quickly remove excess organic matter.
  2. If an unpleasant smell disappears in an aquarium, it means that the struggle with mist is over successfully. Also for elimination of bacterial turbidity it is possible to use elodeya, having landed it superficially in a ground.

Drugs that prevent the appearance of a cloudy precipitate

In order to avoid turbid water, it is necessary to control the level of nitrates, nitrites and ammonia. They stand out as a result of the vital activity of fish, plants and improper care of the water body.

Therefore, fish should be settled in the tank, the size of which corresponds to its volume. Proper feeding of pets, timely cleaning of the products of their vital activity, removal of rotten plants will settle the water balance.

If there is no mechanical or biological filter in the aquarium, replace 30% of the water weekly with fresh and sedimented. Do not add water from the pipeline with the smell of chlorine or boiled.

See also: What water to pour into the aquarium with fish?

Muddy aquarium: from what and why the water becomes cloudy, what to do

Preparations eliminating mechanical turbidity in an aquarium



What is the aquatic environment characteristic of new aquariums?

A few days after installation and start-up, the water in the aquarium dimmed dramatically. Why it happens?

  • The fact is that in the “immature” reservoirs the biological environment has not yet formed, the beneficial bacteria have not spread enough, and are in a state of “stress.” While they multiply massively, and after a few weeks, their colonies will adapt to the new reservoir. In old aquariums, bacteria do not multiply abundantly.
  • The water in the new aquarium also becomes cloudy from the light particles of soil, which rises under the influence of frequent water changes. When pouring water directly on the ground, its pellets rise sharply, floating for a long time. This process creates a visual turbidity of water. To avoid this, it is necessary to make a careful and gradual injection of fluid into the tank. After this, the sediment will “calm down” and settle to the bottom. Purchased fish are unlikely to create a “hurricane” in a new home – they are shy and often hide in shelters. Water with sand sediment is harmless to fish and plants.


Watch the video about why the water in the aquarium grows cloudy.

  • If the water is dimmed and painted in an unnatural color (pink, black, blue) – look at the color of the soil and stones. Activated charcoal will help to bring water into ordinary color – it discolors the paint.
  • Recommendations for the operation of recently launched aquariums

    After a new life in the aquarium wakes up, you need to do the necessary procedures so that no turbidity appears in it.

    1. In a new aquarium, do not partially refresh the water for 2-3 weeks until the microflora has stabilized. A complete change of water is harmful for both fish and plants.
    2. In order to avoid organic sediment at the bottom of the aquarium, you need to do fasting days for the fish. Give the fish as much food as they eat in 1-2 minutes. Unfinished food residues can be collected personally using a special siphon.

    See how to properly feed aquarium fish.

  • Install a quality filter and aerator in the aquarium. Often, turbid water appears due to a poor cleaning system.
  • Use heavy soil with a sinking fraction. Some types of sand or gravel are not able to sink to the bottom even a few days after the installation of the reservoir. Such a ground is deadly to all inhabitants of the reservoir. Either rinse it thoroughly or use coarser sand.
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