Water in the aquarium foams


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.

Causes of water turbidity and how to deal with it

Muddy water in an aquarium is a common phenomenon that almost every aquarist has encountered. Sometimes the causes of the problem are found quickly, and sometimes it takes a long time to figure out why the water has become cloudy. How to deal with the formation of turbidity, what is recommended to do and what is not?

When does water appear in the water?

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 by 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.

How to overcome turbidity in water?

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 soil 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 organics.
  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.

Dregs in the water: types

The color of turbidity will tell about the sources of its formation:

  • The water color is greenish - single-celled algae reproduce;
  • Brown water - peat, humic and tannins, poorly processed snags;
  • Milky white color - unicellular bacteria begin to multiply;
  • The color of the water coincides with the color of the soil or of a stone recently laid on it, which means that the soil was plowed by fish, or the stone turned out to be weak.

Drugs that prevent the appearance of turbid sediment

  1. Aquarium coal is absorbent, which is added after cleaning the tank to the filter for a period of 2 weeks. After extraction, you can fill in a new batch there.

  1. Tetra Aqua CrystalWater is a tool that binds small particles of dirt into one, after which they can be removed or passed through a filter. After 8-12 hours the reservoir will be crystal clear. Dosage - 100 ml per 200 liters of water.
  2. Sera Aquaria Clear - also binds sediment particles, passing it through the filter. During the day, dirt can be removed from the cassette. The drug does not contain harmful substances.
  • Before adding sorbents to water, it is better to move the fish to another container.


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?

Good day. water foams in the aquarium.

Alexander Komendantov

The foam will immediately disappear if you put an active absorber in the filter, for example, activated carbon. Foam is an indicator of a large amount of organic matter. Reduce the diet of fish and leave the aquarium alone, balance will improve - there will be no foam.

Svetlana Arsenyeva

water should be poured out of the settled water, there are still a lot of antiviral drops that drip before you let the fish. the filter can be turned on, let the water run out. somics nothing to do with. still so that the water does not bloom need good lighting


The reason for such questions is the wrong start of the aquarium ... it was not enough just to overdo the water for a week ... you did not enrich it, because the filter was turned off ... and boiling only made the situation worse ...
in order to get an intelligent answer to your question - you need to ask the question correctly ... the volume of the aquarium ?? ? his age ?? ? quantity and fraction of soil ?? ? number (by species separately) of fish, mollusks and other hydrobionts ?? ? the number (and types) of living plants ?? ? Or you only have plastic ?? What is the cost of lighting (the number and power of the lamps, the length of daylight hours) ?? ? mode of substitution of water and siphon bottom ?? ? mode of feeding fish and what feed ???. heh ... and you can still find out a lot before giving a comprehensive answer and correct recommendations ...
questions remained (or rather a bunch of new ones appeared)))) ??? contact the aquarium community "Aquarium at Home" // here will always help and prompt

Bar Kochba

Why don't you turn on the filter? ! He must work necessarily. So that the water does not foam, it is necessary to siphon the soil, cleaning it from the remnants of food and decomposing plant residues. Try to salt the water at the rate of 1 gram per liter of water. Salt inhibits the growth of microorganisms. In the filter, as a filler, put activated carbon (tablets), in combination with other materials. Maybe you have strong lighting. Reduce lamp power. You may get direct sunlight in your watercolor - cut them off with a thick curtain or a screen made of dark paper or cloth. In a couple of weeks, everything should get better. Good luck.

Elena Gabrielyan

The first reason is the wrong start of the aquarium.
He has to prepare for the launch for a month, turn on the filter, the water heater and let the equipment work for a week. After a week, plant the plants and leave the aquarium alone for another 2 weeks, during which time the plants will get sick and start living their lives, a colony of beneficial bacteria will settle on the filtering material and it will become biologically active, which is useful for plants and fish. The soil should be cleaned with live plants no more than 1 time per month. Feed the fish with high quality feed
(frozen daphnia, bloodworm), dry only as an additive. From dry food strongly spoil the water. Fish should be fed adults 1 time per day. adolescents 2 times a day, ensuring that food was eaten in 2-3 minutes. One day do not feed the fish.
Fish after the installation of a new aquarium run no earlier than one month.

What if the water in the tank stinks, foams and grows cloudy? Bought aquasafe does not help

Elizabeth Halliwell

In a zoo, nefig sellers do not know and advise if only to sell.
Aquarium can not be washed !!!! Replacements of 20-35% once a week for separated water for 2-3 days + siphon of the bottom with siphon along with substitutions
In the aquarium (most of the filter sponge, as well as in the ground and in the water itself there are bacteria that process fish waste into safe - water is drained, changed all - there is no biobalance.) Wait until the balance returns, you can feed the week less or after a day (if not young)
7 fish, 60 liters - what kind of fish still depends


Well, if the water foams, stinks, turns green, grows turbid, then you have nothing left but to completely change the aquarium, not as usual for 30% water changes.
AquaSave is an air conditioner that makes tap water suitable for fish habitat, provided it is added at least 2 hours before the fish are planted in the aquarium.
Turn off the lamp, fish do not need light, only plants that you do not have, put the aquarium away from the window.
A slight turbidity after the change of water is permissible, because there are still no beneficial bacteria in the aquarium.
If it drills completely, they are sold in pet stores
Cristal Walter (of the same Tetra company), he makes the water crystal clear, but he also does not act instantly and there is a possibility that you will put the filter in if not properly used.
Safe Start - please, useful bacteria to start the aquarium
Easy Balanse - stabilizes the pH of the water

Why "foam" the water in a new aquarium It seems everything was done, as they explained to us in the store

Vladimir Chernyshev

- sand (pebbles and other prdmety, up to the compressor’s chillers) should be boiled
- water should be settled (three days in a neutral container - glass jars), at the same time there is water in the aquarium, which we then pour out
- Potm plant algae (if possible, although a liter of water from a normal aquarium, with friends, for example, but not from sellers)
- three snail days later
- only if after three or four days after the water snails behaves “incorrectly” we begin to think where the “contagion” comes from (aquarium, water, algae, snails). maybe it makes sense to buy drinking water at the grocery store or choose another pet shop.
if something and this list is missed in the store - IMHO, a great reason to follow the store

Jacob Oskanov

It seems that the necessary bacteria did not have time to start (you need to pour water from the old aquarium over time. It will pass with time.) To speed up the purification process, you can buy special cultures (Sera)

Water is foaming in the aquarium!

Natalia A.

Feed no one could sypanut the goodness of his heart? Filter at night or during the day did not turn off the electric?
So it smells like a swamp, and the answer is that your child may have decided to “save” fish from starvation in your absence and the water itself cannot be green — the process has already gone

Katie Hudson

I can advise an unusual thing, but I have 15 years of aquas, write later if you follow the advice. 1. Wash everything with a powder, including a primer, a compressor and a filter, up to the cord, i.e. everything that was in the water. 2 Pour boiled water into the aquas and let the fish into it (except for pond fish and sturgeon, they can react badly) Only in boiled water there is no oxygen, so turn on the compressor in advance. If there were plants in that aquas where the water was foaming, do not plant them in the aquas


Usually foam is an indicator of a large amount of organic matter in water. Organics and remove with foam using special devices. Overfeed could not? Water could not turn green in a few hours, which means that the process had been going on for several days. And now, the result is an outbreak of bacteria, microalgae.

Andrey Makovoz

Foam happens when labyrinth fishes start building nests for breeding. But in this case, the water, for whatever reason, became unsuitable, and the fish swam across the surface of the water, and gasped for air, as a result of which foam was formed.