Why water goes out in an aquarium


Why does the water in the aquarium smell like a swamp?

With the help of an aquarium your home will be filled with beauty, comfort and warmth of exotic reservoirs. Aquarium is a great place to observe beautiful fish and calm meditation. However, a damaged tank can ruin both your mood and the health of its inhabitants. Sometimes the water goes out and it stinks like a swamp. Muddy water spoils the impression, and makes the nursery unfit for further use. The problem requires an immediate solution, which involves finding out the cause and its immediate elimination.

If the water in the aquarium began to spawn - the reasons

The main reasons why the water from the aquarium smells unpleasant, are indicated below:

  • Irregular cleaning of the tank or poor cleaning (filtration);
  • Improper aeration, due to which the water is not saturated with sufficient oxygen;
  • Unsuitable aquarium plants;
  • Nursery overpopulation - little water is allocated to one adult animal;
  • Overfeeding fish, reptiles or amphibians;
  • Feeding pets low-quality food;
  • The sudden death of the inhabitants of the reservoir, the body goes dead and decomposes;
  • The appearance of sludge in the soil and water.

Muddy water that smells like a swamp - what to do?

If the aquarium fluid has become rotten, which has strongly started to smell, and even smells like a swamp, it is possible to establish the causes of the imbalance of the aquatic environment through practice and observation. In the process of research, it will be possible to determine the method by which turbid water, which goes out and smells unpleasant, will be neutralized. To solve the problem should be phased actions.

  1. Decide whether you chose the right fish food. To do this, change the water, buy another, better food and test it in a few days. After a day, a turbid liquid that smells like a swamp has disappeared and is clean, odorless, which means the cause of the problem was unsuitable food. In the case where the action did not lead to a result, other reasons should be sought.
  2. It so happens that you feed the fish and other animals with high-quality feed, but the aquatic environment is still muddy and "gives" the swamp. Probably, you overfeed the inhabitants of the nursery, and they do not have time to eat all the granules. Not all fish eat a lot, so arrange unloading diets for them and add less feed to the water. After a few days, smell the tank - if the unpleasant smell has disappeared. If yes, then you have found the reason. The uneaten food is mixed with the soil, decomposing.

    Watch a video on how to feed the fish properly.

  3. If you are a beginner aquarist and for the first time launched an aquarium, due to lack of experience you could create the wrong neighborhood in the nursery. It turns out that not all types of fish, snails, amphibians and reptiles get along together. Some will disturb others, and because of close space, someone will fall ill and die, quietly sinking to the bottom. Due to severe stress, insufficient shelters and swimming places, the inhabitants of the reservoir excrete feces with a characteristic aroma. After a day or two, muddy water will appear with a stench. What to do - get a spacious tank, pour water into it with suitable parameters, and populate compatible pets there. Or buy two aquariums at once, if many species are incompatible within the same space. Also carefully inspect the bottom - maybe one of the fish died, and the body is still not removed.

  4. Wrong decorations can "decorate" the aquarium with an unpleasant smell. This is not a perfume, but a living growth, it has its own life. In this case, contact a specialist (a seller in a store or a botanist), and ask whether the purchased plant is able to secrete flavored vapors. Specify the size of the tank capacity, type of soil and water parameters. Replant the plant in the right environment - it may need a larger or smaller aquarium.
  5. When the fish behave excessively actively, they try to lie to the bottom - the reason for the incorrect supply of oxygen, impaired work of aeration. To fix the equipment, you must:
  • install a compressor with high power;
  • replace the filter with a new one, with a forced circulation system;
  • Ask a specialist how to adjust the oxygen supply to an acceptable level.

See how to replace the water and clean the soil in the aquarium.

In the aquarium, the liquid is rotting and the marsh stinks - how to clean the water?

Did you find out why the aquarium stinks, but you are not exactly sure what to do? Proper cleaning of the fish nursery is your main assistant! When all the above tips have not led to the expected result, you will have to make a new plan to save the reservoir and its inhabitants. It consists in the correct cleaning of the container from harmful impurities and parasites, which are the main causes of an unpleasant smell. Before capital cleaning prepare such tools:

  • at least 5-10 liter jars with infused water of appropriate parameters for the temporary settlement of fish;
  • net, scraper and sponge;
  • big bucket;
  • thermometer;
  • special liquid to remove contamination from aquarium glass (available in stores);
  • aquarium pump;
  • pH adjuster.

Remove all animals from the nursery with a net by placing them in a jar of water. Disconnect the tank from the supply of current, light, turn off the filter and aerator. Rinse and clean the sponge. Use a scraper and a sponge to clean the windows, removing plaque, algae and other droppings from them. Take the pump, lower one end into the bucket, the second into the tank with dirty water, then pump out from 20 to 50% of all the water, depending on when it was last changed. Put gauze on the pump, and run it along the bottom of the ground, the air will make the bottom siphon. After cleaning, remove all decorations.

The scenery should be pulled out and processed, leaving them in a separate container with a little salted water (1 teaspoon per 20 liters) or scalding them with boiling water. If plaque forms on them, scrape it with an unnecessary toothbrush or gauze. After processing, place the decorations on a clean cloth to dry, then reinstall in the aquarium.

Pour into the aquarium a new, clean water of the same parameters that fish and plants used to (temperature, pH, hardness). Infused water should be three days for chlorine to evaporate from it. Polish the outer glass of the tank (liquid for aquarium glass), and then reconnect all the devices. After the procedure, gradually run the fish. Cleaning can be done in a few hours, the main thing - to adhere to accuracy.

Experienced breeders strongly advise settling in the nursery of the “orderlies” of the reservoir - freshwater snails, speckled catfish, mollies, antsistrusov, gyrinoheyls, labo, Japanese pond shrimps. The fishes living in the lower layers do an excellent job with the uneaten food that fell to the bottom, the snails eat carrion, and the shrimps and other fish mentioned above do an excellent job with algae. When settling, you should consider compatibility with each other, then your aquarium will resemble a natural biotope, with crystal clear water and beautiful living creatures.

How to get rid of the smell in the aquarium :: should the aquarium smell like :: Apartment and cottage :: Other

How to get rid of the smell in the aquarium

Some novice aquarists are faced with this situation: recently changed water suddenly begins to emit a whole bunch of unpleasant odors. The solution to this problem depends on the cause of the stench, and there may be several ways out.

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1. The first thing that can be done is to thoroughly clean the aquarium and everything that is in it (stones, shells, decorative castles, houses, etc.). Rinse the inside of the glass well, as even if at first glance they seem to be clean, they may still have a slippery water stain on them. If a few days later from the aquarium again smells unpleasant, you need to look for more reasons in more detail.

2. First, determine which smell comes from your tank. If it smells a bit of mud or swamp, you can calm down. This fragrance means only that everything is in order with him and his inhabitants. This aquarium should smell like a river.

3. If you feel completely different unpleasant odors - rotten eggs, onions or garlic, you must take decisive action. The smell of onions can produce some aquatic plants. For example, if in your aquarium cryptocarins live, there may be such a smell. In this case, add to them a pair of ambulium bushes, a little hornpole, and a few hemianthus bushes. Unpleasant odor should disappear.

4. The cause of the unpleasant the smell there may be impurities that accumulate at the bottom of the "pond" - this is both the waste products of fish and the remnants of food. If the aquarium is too large and there is no possibility to wash it completely, just draw a primer siphon. For this purpose, a special device is used in the form of a hose with a tip through which water passes, taking with it all the accumulated dirt.

5. Together with the ground siphon it is necessary to carry out the process of partial replacement of water. This will also help to heal the atmosphere and remove substances harmful to fish. This should be done twice a week, at the same time it is necessary to replace from 20 to 30% of the water in the aquarium. You can use ordinary tap water, but it must be defended during the day.

6. Determine if the fish have enough oxygen. To do this, see if they float close to the surface, gasping for air. In this case, you need to buy a good air compressor, which must constantly work, providing good aeration.

Smells the water in the aquarium

Beautiful and harmoniously located in the room aquarium can be a decoration for any interior. Aquarium - a great way to relax and achieve internal balance. However, the fish themselves and their house need constant and competent care. Beginners and even experienced aquarists often encounter undesirable and unpleasant situations that are the result of improper or inadequate care. One of these situations is when the water in the aquarium smells unpleasant.

Let's try to find out why aquarium water smells, and what actions you can take to eliminate unwanted odors from the aquarium.

Causes of smell from the aquarium

With a situation where water smells unpleasant or even stinks, I come across, perhaps, every fan of aquarium fish. The causes of this phenomenon may be different:

  • The aquarium has not been cleaned for a long time. If you do not know, the dwelling for fish and other underwater inhabitants should be periodically cleaned, washing both the soil and algae and the glass of the aquarium. It should also regularly change the water. The smaller the aquarium, the more frequent cleaning it needs.
  • Poor quality fish food. Overdue feed can easily lead to rotting bacteria in the aquatic environment and in the soil. If you find an unpleasant odor in a relatively clean aquarium, try changing the type of food - if the problem disappears, then it’s a matter of poor nutrition.
  • Excess feed. Food is quite normal, but it is possible that you give it in excess. Feed particles that are not eaten gradually settle to the bottom and turn into the ideal substrate for the reproduction of microorganisms.
  • Overpopulation of aquarium. Such a problem is often encountered by novice aquarists who try to fit as many fish of various sizes and species as possible into a standard tank. It should be remembered that the aquarium is a kind of closed biosystem, which must be in harmony and balance. If the house has more residents than it should be, inevitably problems arise with the cleanliness of the premises.
  • The presence of some specific plants. Some types of algae can produce a peculiar smell. It is better to immediately clarify this point during the purchase of plants in the store. Again, the smaller the capacity, the more noticeable the vital activity of plant organisms: in a large volume of water the odor from algae is leveled.
  • Ground souring: methane release by soil bacteria.
  • Lack of oxygen. Deficiency o2 need to be removed with the help of a special device with the function of air circulation or a conventional compressor. Constantly high oxygen content in the water does not allow bacteria of the anaerobic type to multiply rapidly.
  • Too bright light. The abundance of radiation can lead to the multiplication and growth of unicellular algae, which, in turn, can produce unpleasant odors.
  • Too dim light. The lack of radiation causes the active growth of other algae, which also adversely affects the state of the water.

So, in most cases, the unpleasant smell of water is a consequence of excessive activity of putrefactive bacteria or plant organisms. Therefore, the main task of an aquarist is not to allow microorganisms to multiply too intensively, and for plants to bloom too much.

How to eliminate the unpleasant smell in the aquarium

Suppose you figure out why the water smells in an aquarium. What measures need to be taken to eliminate this problem?

The first thing you can do is to carefully clean the aquarium with all its contents. General cleaning is carried out according to certain rules. It is necessary to consistently clean the walls, bottom, stones, algae and all other elements of the home for fish. Rotted algae and excess plants should be removed.

Replacing the water in the aquarium is carried out gradually - it can take 5-7 days. A complete and simultaneous change of water is carried out in exceptional cases: it is a huge stress for fish, which can lead to the death of fry and especially sensitive species.

Other methods of combating an unpleasant odor are saturation of water with a sufficient amount of oxygen, changing the feed or regulating its amount, ensuring the optimum amount of light emission. If the aquarium is overpopulated, a part of the inhabitants should be transplanted into another container, sold or donated: it is better to lose some of the pets than to constantly face the problem of the abundance of feces and harmful bacteria. In an overpopulated aquarium, fish feel uneasy and often show aggression towards each other.

Why on the 2nd day the water in the new aquarium gets rotten

Lee tyan

It also depends on the fish. The more often you feed them, the faster the water gets rotten. The swelling of the water is indicated not by the feed itself, but by the stool of the fish. I have at the very aquarium and have to clean it 1 in 2 days)) To eliminate the "eternal cleaning" of the aquarium, I advise you to put a special filter, but this will require not a small aquarium))


Life starts. An aquarium that lives only 2 days is a dead aquarium, because there is no life. Now bacteria, unicellular animals, unicellular algae will multiply in it ... Let it stand for 7-14 days, the water will clear itself and become transparent. So the aquarium lives. In theory, it is only in such an aquarium that they launch fish.

The water in the aquarium got rotten - what to do?

Elizabeth Halliwell

The aquarium is never washed !!!! Wait until the biobalance is established (you do not need to wash the water and disinfect it again), for a change of 30% once a week, for separated water for 2-3 days.
Every week, substitute for 20-35% of water, + ground siphon
Aeration to turn on at full capacity, while the fish feed very little or every other day for a little bit


You are stern with neons, if you cichlid them. Although looking to some cichlids ...
Fishes must give air. I would otsadil in clean defended water, but gently, not immediately pouring them into new water. Read how to properly transplant fish. Next, I will most likely restart the bank. With soil washing and other things. Wash pump thoroughly, inspect all parts. And, if mechanical damage is not visible, then only a technician will tell you. It is easier to buy a new one, for such a volume they are not very expensive. Although, if the water just stagnated, did not change color and did not smell much, perhaps you can save the situation simply by running all the equipment and changing some of the water.

Natalia A.

At this stage, condo in the trash, to replace up to 50% of the water, providing a purge, flora is better to replace the live if possible and never unnecessarily restart the aquas, just kill the microflora and put the fish, is it necessary? And what kind of cichlids?

Why does the water in the aquarium go out?


In my aquarium, except catfish ... live
two ordinary KARASA from a nearby pond ...
and about a hundred snails (they breed
fast) and there is no smell !!!! And water ...
perfectly transparent !!!! Good luck !!!!

Vova Shumilov

Ahrenet, a lot of light and heat !!!
Gee fish died !!!
Water needs to be replaced up to 5 percent once a week, put a filter, it also helps,
Food, because of which there is rotting in the water, it is necessary to feed so that they ate everything in five minutes to remove the excess. but over time you will learn to feed so that there is no excess
Well, and if the aquarium is small within 20 liters, then the care is much more complicated than 200 liters.
Well, the easiest option in the search engine hammer home aquarium
get a bunch of information
But in general, the less you climb to the aquarium, the residents live better

Why does the water in the aquarium go dead?


Красноухие черепахи очень гадостные рептилии (в том смысле, что гадят много) . Мы в итоге убрали грунт из аквариума и поставили хороший фильтр (у нас стоял Fluval), можно без аэрации, но бережок должен быть. Фильтр подбирают исходя из литража аквариума, но в данном случае можно даже на больший объем, чем требуется. Особенно если решить грунт оставить. And if the soil is removed, then the remnants of food, with which the filter has failed, and the feces can be siphoned off and partially filled with water.

Vasily Parrots

Try every day to change the fourth part of the water in the aquarium, so they do when they have aquarium fish, and even more so for a turtle.
Dip silicon in the aquarium, usually in the form of stones. You can buy and plant snails in the form of spirals, they also clean the glass and partially water.
Install a filter to circulate water and supply air to the water.
Do not throw a lot of food. Feed on instructions. Foods sink to the bottom and decompose.


Filter performance in 5-7 volumes of the aquarium, remove the soil. Feed in a separate tank 2-3 times a week.

Why the foul smell of decay from the aquarium? Washed, poured new water, still the problem has not disappeared.


Yes, because you have a surplus of organic water! At the same time, anaerobic processes prevail over aerobic! In other words, you have poor aeration in water, not enough oxygen. And never change all the water in the aquarium! Maximum can be replaced at a time no more than 25%! Otherwise, you disrupt the biological equilibrium in the water and you will go to a shift in the chemical composition, which is affected by bacteria living in the soil ...
Changing the water completely, you kill the beneficial microflora and set the stage for the development of harmful bacteria. Improve the filtration and blowing of water, do not pour a lot of feed into the ode, especially dry, which should be eliminated altogether, and in 3-5 days everything will disappear by itself ... You will get the so-called old water, with established biological balance.

Semyon Plutalov

The main problem is that you probably have an aquarium on the sunny side, in this case the water quickly begins to bloom and, accordingly, an unpleasant smell appears !! ! The second is that it may be standing water, therefore a constant circulation of water is necessary. You can use the pump compressor. This equipment should work most of the day. And also my advice to you is to change the water at most once a year. Because fish create their own microflora, and frequent water changes lead to disruption of microflora, which in turn leads to illness and death of fish. Water must be poured over the place of water that has gone bad, and sometimes with the help of a usual thin hose to clean the bottom of the aquarian, from food residue, etc., and with the help of a brush, clean the walls of the aquarian. Believe you, the aquarian will be in perfect condition. I have not changed the water for 4 years, and the aquarian is perfectly clean and the water is transparent like a tear

Marat Khannanov

Firstly, it is necessary to check the operation of the filter - enough water saturation with oxygen, secondly, check the temperature and illumination - the water temperature should be no more than 27-28 degrees, the illumination should not cause the development of blue-green algae, thirdly, although once a year it is necessary to perform a full cleaning of the aquarium with washing of the soil, stones, accessories of the aquarium, it is necessary to remove the growths on the stones and accessories with a brush. You can also use the tool to combat blue-green algae.

Bar Kochba

Close watercolor. opaque blanket for a week or two. Fish feed in 3-4 days, little by little. Do not die, do not be afraid. You can add trypaflavin or methylene blue to water. Instructions on the package. You are probably overfeeding fish. The remains decompose in water, forming a putrid odor. While the water is not established biological balance, watercolor does not open! ! It would be nice to take the "old water" from familiar aquarists, from a good, healthy aquarium. Then the process will go faster. In the prosperous aqua water smells of hay. Very nice to smell like that. Filter wash and disinfect. Water aeration to continue. Good luck !!

Why the water in the aquarium turtle goes out.


The easiest way - at least half change the water after each feeding. Water with droppings does not fade so quickly. It is the remnants of food spoil some water. Yes, and it is not necessary to give a lot of food - if, after feeding, the turtle does not mind eating, it is normal. That is, after feeding, she should be a little hungry. It is important not to overfeed it, because a cold-blooded turtle, it spends much less energy than warm-blooded animals. So, let's eat some food, if the water is polluted - change it immediately, well, not less than once every two days, change the water completely!

Alevtina Simkova

The turtle most likely it doesn’t bother to live much ... so you need to worry about it only in one case, if the reason for the smell is infection. But if the bug is otherwise okay, then most likely it is just that it actively pollutes the aquarium (this is not uncommon for them. Rarity is relatively “clean”)
And maybe just give a lot of food, not eaten and goes out.
Most likely, soon adapt and adjust everything — rarely, who does it all “with a swoop” :)))

Noise Mice

For this reason I could not keep the red-eared turtles. Two or three times a day, I changed the water in the terrarium. They eat a lot, cocoa accordingly, too ... And they are also very noisy. Although watching them is very cool. I had to carry it to a living corner to school ...

The water in the aquarium smells, changed, anyway. what to do

Konstantin Shaly

Formed stagnant zones in aqua, in them as a result of rotting hydrogen sulfide is formed. This is a consequence, and the reasons may be as follows: the filter does not work correctly (it could clog, either shut off, or in an aquarium there is such a zone where the filter flow simply cannot get into); excess of organic matter with which the filter is not corrected (banal overfeeding, large overpopulation); lack of oxygen in the water with overcrowding. Siphonify the bottom, add 10 parts of fresh water, rinse the filter after 3 hours. Not until not after this fish do not feed. At the same time, aeration of water in the aquarium is necessary. On the next day, replace 1/3 of the water in the water, do not feed the fish. On the third day, do not feed the fish, conduct a gentle washing of the filter element in the aquarium water, do not feed the fish. If we carry out all these procedures consistently, then by the end of the week the situation will stabilize, until then the fish is not fed.

Sofia Sbitneva

Try to wash the inside of the aquarium. Look on the Internet how to properly care for the aquarium.
Personally, I read this article here, look can help.

Sanek Payan

Throw out dead fish from the aquarium ... then populate the new ones, alive and the smell will disappear on the 3rd day ... Joke! ))))))))))) The stronger the illumination of the aquarium, the faster the microorganisms multiply in it and, accordingly, the mold appears faster on the walls of the aquarium, which can cause odor. for a good wall cleaning, filter, and change the water. where is one third, no longer necessary, can adversely affect the fish. Best of all, the water would stand and stand for a couple of days, for 2 days at the bottom of the dishes where the water stood there will be a thin layer of sediment from water - harmful impurities and metals will remain on the dishes, not in the aquarium ... not least, Successes in this difficult and interesting business!

Elena Gabrielyan

You cannot completely change the water in the aquarium; you can only replace part of the water with a thorough bottom siphon with fresh water that is not less than 2 to 3 days old. Now it is necessary to carefully siphon the soil of the aquarium with a special siphon and take it as a rule to carry out such an operation 1 time in 7–10 days. It is necessary to feed the fish once a day with 1 day of a mandatory hunger strike,. their feed should be completely eaten in 2 to 5 minutes without residue. Eaten food decomposing in the ground gives turbidity and unpleasant odor.

Why does the aquarium stink

Zulfir Gareev

It is difficult to answer this question, as the smell from the water in the aquarium can arise from many reasons. The first is low-quality food or over-feeding. Now, in pursuit of money, feed producers, especially daphnia and gammarus, neglect the production technology. Careless sellers give us cheap food at a high price. Immediately determine the quality of daphnia or gammarus impossible. Only when feeding can you notice how the water begins to turn yellow, grow cloudy and stink. This is the main answer to the question, why does the water in the aquarium stink? The solution is simple, you need to buy food for fish in another store.
A second, possible cause of the smell of water may be overpopulation of the aquarium. This is one of the main problems of novice aquarists. They want to keep different fish in a small aquarium. Or another option for the fish is very little space. There was one case in life when a friend bought a big 3 liter glass and planted a goldfish in it. Of course, the water constantly smelled, since such a volume for a large fish is not enough.
And finally, the third reason for which the smell of water in the aquarium occurs is insufficient aeration. Take the money and buy an air compressor. By the way, it should work constantly! To the water was sufficient and constant amount of oxygen.
In conclusion, I will say that in all cases a 50% water change is required. And do not forget regularly, 1 time in 2 weeks to replace water.

Elena Gabrielyan

So what do you want that. Restarting killed completely all biological balance. Aquarium is not a bank with fish and water. This is a closed little world and any unwanted interference with its life has a bad effect on all inhabitants.
Now on points
1. The establishment of a little or less biological equilibrium takes 12-14 days, for a full month.
2. The stench comes from overfeeding the fish, they simply do not have time to eat everything, but since the bio-equilibrium does not yet exist, the good bacteria do not have time to process everything the process of decomposition and decay begins.
What to do now: first of all, do not touch anything, do not substitute or add water, do not pour any air conditioners to speed up the process, do not turn off the filter, let it work 24 hours a day and reduce feeding fish to 1 time in 2 days to give at a minimum just enough for a minute two he was completely eaten. As soon as everything is settled and the bio-balance is established, the water will return to normal, and the water will cease to stink.
Ps. No, you do not know. If they knew, they would not have done a full restart, since in well-balanced systems water is not replaced by years (if it is not force majeure), it is enough to siphon the soil and replace from 20 to 30% of the total weekly.

Julia Romanova

Aha, in a couple of days from topikaster there will be a hysterical message like "fish die what to do ????"
Well, actually Elena wrote everything to you, you cannot wash the aquarium completely and completely change all the water, this is a gross mistake. I would not feed the fish for 2-3 days at all, so ammonia and nitrites could be fed from that, and today I would run to the nearest pet shop and buy a conditioner "nitrivek" or a capsule "bactozyme" to speed up the maturation of the aquarium. And in your case it is possible and even necessary to substitute. A couple of days after using the air conditioner, change 1/4 to 1/3 of the volume and then chase regularly 1/4 of the volume of water once a week and pump over the soil. Restarting can be done only in one case, if everything is dead, say from oodinosis or some intractable disease. When the fish begin to feed, quite a bit, so that no residue of food was not.
Why are you doing a restart? For what purpose? With regular proper care it is not necessary!