Why die fish


What to do if you find a dead fish?

Suddenly discovered that you have died in a fish tank and do not know what to do now? We have compiled five tips for you to cope with the death of the fish and what to do if this happened. But, remember that even in the most ideal conditions, they still die. Often, suddenly, for no apparent reason and very annoying for the owner. Especially if it is a large and beautiful fish, such as cichlids.

Attention! First of all, check how your fish breathe!

Often aquarium fish die due to the fact that the water parameters have changed. The most pernicious effect on them is the low level of oxygen content in the water. Characteristic behavior is that most fish stand in the surface of the water and swallow air from it. If the situation is not corrected, then after a while they begin to die. At the same time, such situations can occur even among experienced aquarists! The oxygen content in water depends on the temperature of the water (the higher it is, the less oxygen is dissolved), the chemical composition of the water, the bacterial film on the surface of the water, the outbreak of algae or ciliates. You can help partial water changes by turning on aeration or directing the flow from the filter close to the surface of the water. The fact is that during gas exchange, it is the fluctuations of the water surface that play the decisive role.

1. Look at

Check and recalculate your fish daily, while feeding. Are they all alive? Are everyone healthy? Does everyone have a good appetite? Six neons and three speckled, everything is in place?
If someone is missed, check the corners of the aquarium and lift the lid, maybe it is somewhere upstairs in the plants? But you can not find a fish, it is quite possible that she died. In this case, stop searching. As a rule, a dead fish becomes visible anyway, it either floats to the surface, or lies on the bottom, the floor is snagged, stoned, or even falls into the filter. Every day, inspect the aquarium, did the dead fish appear? If found, then ...

2. Remove the dead fish

Any dead fish, as well as large snails (such as ampoules or mariz) should be removed from the aquarium. They rot very quickly in warm water and create soil for the development of bacteria, the water is muddier and begins to stink. This all poisons other fish and leads to their death.

3. Look at the dead fish

If the fish is not too decomposed, do not hesitate to examine it. This is unpleasant, but necessary. Are her fins and scales full? Maybe her neighbors beat her to death? Are the eyes in place and are they dull? Strongly swollen belly like in the picture? Maybe she has an internal infection or she has poisoned herself with something.

4. Check water

Every time you find a dead fish in your tank, you need to check the quality of the water with the help of tests. Very often the cause of fish death is the increase in the content of harmful substances in the water - ammonia and nitrates. To test them, get in advance tests for water, better drip.

5. Analyze

The test results will show two results, either everything is fine in your tank and you should look for the cause in another one, or the water is already rather polluted and you need to replace it. But, remember that it is better to change no more than 20-25% of the volume of the aquarium, so as not to change the maintenance conditions of the fish too dramatically.
If the water is all right, then you need to try to determine the cause of death of the fish. Of the most common: disease, hunger, overfeeding (especially dry food and bloodworms), long stress due to improper housing conditions, age, the attack of other fish. And a very frequent reason - and who knows why ... Believe me, any aquarist, even the one who has been keeping a complex fish for many years, has sudden deaths to watch his favorite fish.
If the incident is a single case, then do not worry - just watch out for new fish or die. If this happens all the time, then obviously something is wrong. Be sure to contact an experienced aquarist, it's easy to find now, since there are forums and the Internet.

Fish die in the aquarium: reasons

Why die fish in an aquarium?

Sometimes in the aquarium, the fish begin to die one by one. Their owner makes a rash decision - he goes to the pet store and buys any funds offered by the seller. But nothing helps. So, why fish die in an aquarium? There are several reasons for this.

Bacteria - fight!

The main problem of all troubles in an aquarium is dirty water. Beginning breeders, as a rule, forget that the fish not only breathes and eats, but also feces. As a result, the increased content of nitrate, ammonium and nitrite leads to a mora. And the first two are especially dangerous. Poisoning with these substances can be seen with the naked eye: there is a smell of rot, the water becomes cloudy and the question: "Why do the fish die in the aquarium?" can be considered closed.

Bacteria that fight poison and toxins live in the filter media and in the soil. It is important to clean both substrates carefully but carefully. Otherwise, you can destroy the fighters for health. Thus, there is no need to clean the aquarium to sterility and periodically turn off the filter (otherwise anaerobic microorganisms will settle there). By following these simple rules, you can maintain the health of this biosystem and then the fish will not die.
To restore the lost balance, the following instructions are recommended:

  1. Stop feeding for a short period of time. Fish without food can last for several days
  2. Measure the level of toxic substances using special tests (sold at the pet store)
  3. If the readings are equal to 2 ppm, then it is necessary to replace half the water in the aquarium, but gradually, otherwise the death of the fish will not stop.
  4. Follow the second and third points for several days until the microflora is restored.
  5. In no case can not use antibiotics. They are completely destroyed biobalance!

It is important to remember that the aquarium, as a fabulous teremok, can fall apart if it is overpopulated. Fish die because of gluttony. If overfeeding occurs, food debris will simply begin to decompose. Therefore, it is better to reduce portions than to increase.


As a rule, the temperature, pH and hardness of the water in the pet store is very different from the aquarium breeder. The strongest stress, and therefore the reason why the fish die in the aquarium, can become an ordinary room in a new habitat. Changes in pH can even kill pets or lead to their fatal illness. How to help them endure stress?
First you need to put the bag with the newly purchased fish in the aquarium and attach it with a clothespin to the glass. Then - weak aeration. After 10 minutes you need to pour into the package aquarium water. Repeat this step every 12-15 minutes. After half an hour, you can release the fish in a new home. And finally, the last step - the addition of anti-stress drugs and feeding.

Living water or dead?

If the fish die after the change of water and, moreover on a massive scale, it means that the plumbing companies are to blame. They are usually interested in the health of a person, not his pets. Companies may suddenly change the Ph or the hardness of the water. In addition, it is strongly influenced by the melting of snow.
In this case, it is recommended (especially in spring) to defend water, at least a day. In addition, it is desirable to heat it to 70 degrees, and then gradually cool. Another tip: do not make large changes of liquid (more than 30% of the volume). It is also important to avoid sudden changes in temperature in the aquarium.


Very often, this is the reason newcomers hear from sellers to the question: "Why do I have fish die in an aquarium?", Because the latter are interested in profits from sales of expensive drugs. It is important after the purchase of pets to quarantine, and sometimes - preventive treatment. But even in this case, the fish can get sick. In this case, to prevent the pestilence, the ill person should be placed in a separate aquarium.
Imported fish sometimes bring rare species of disease that cannot be determined without special laboratory analysis. In pet stores there are a lot of drugs that can save pets from misfortune, but it’s better not to be consulted about the choice of treatment from the sellers, but from experienced aquarists. But, as a rule, before treating the problem itself, it is necessary to look for its source: reduced immunity and, consequently, the poor state of the composition of the water.
Fish die from many causes, but the pillars of care for them are unchanged: regular cleaning of the soil and water filtration, timely replacement of water, not overfeeding.

Why die fish in an aquarium?

Most of the inhabitants of the aquarium needs careful maintenance. This concerns the quality and composition of water, neighbors and vegetation. If the fish began to die in an aquarium, the necessary conditions for keeping were most likely not met. To avoid such troubles, it is worthwhile to familiarize yourself with the list, which lists the most common causes of death of fish.

Why die fish in an aquarium?

  1. Like all the abodes of our planet, the fish need air, they need aeration of water. Always check the cleanliness of the air and water before settling. Fish often die in the aquarium from the lack of oxygen. This happens when you have settled many inhabitants in too small an aquarium.
  2. But even with the observance of all the rules, sometimes the fish die immediately after settling. This is due to the fact that they have a simple shock of adaptation. That is why it is impossible to release a pet into the general aquarium right after the purchase.
  3. The next reason why the fish die in the aquarium is the introduction of a disease. As a rule, you will notice a gradual deterioration of the condition of the fish, and the disease will mainly spread to one species.
  4. Never neglect the aquarium lighting. This is especially true for lovers of variegated tropical species. Light day for such fish should last about 12 hours. With a lack of light, the pet's biological clock will break, leading to death.
  5. The temperature of the water is no less important than its composition. It is believed that a couple of degrees will not be able to significantly affect the state of the aquarium inhabitants. Meanwhile, the fish are very sensitive to the slightest temperature changes, so that constant fluctuations in degrees can become a serious threat.
  6. Fish die in the aquarium if they do not follow the recommended composition of water. When buying a new species, be sure to carefully study the water characteristics that are recommended for it. Water hardness directly affects the condition of the pet, if the water is too soft or hard, it is almost a guarantee of death.
  7. Quite often, problems begin with the settlement of incompatible species. This statement is true for both carnivorous and herbivorous species. And sometimes only one species of fish dies in the aquarium, while the others feel quite normal. It is likely that there have been changes in the composition of the water, which for some fish are insignificant, and for others have caused the death.
  8. If the fish die in the new aquarium and at the same time all the water parameters and selection rules are observed, you should pay attention to the feeding regime. Newbies often only get along with dry food and just throw a handful of pellets. After a time, the inflammation of the stomach is read in such fish from such a regime and they die en masse. In fact, your pets need a varied diet. Add vegetable and live food to the menu.

Why do fish die in an aquarium: forewarned is forearmed

To avoid such problems, it is necessary to take the content and maintenance of the aquarium seriously. Before you go in search of fish, do not be lazy to read enough literature about the features of their content. Often we try not to follow such a simple rule and simply find out the details in the pet store.

Most often the reasons why the fish die in an aquarium are associated with impaired content. Always keep on control all the parameters of the water in the aquarium, track any changes in the behavior and condition of pets. These simple rules will allow you to notice the beginning of the problem in time and solve it in a short time. Fish can not tell you, but in her behavior you will always notice something was wrong.

Why die fish in an aquarium, what to do?

Why do fish die
or the story of the sad fate of Goldfish!

The motive for writing this article was the communication on the form with a certain citizen who wrote in the section on helping to determine the disease of fish.

"Help, please, I have a telescope at the age of 6 months. I haven’t eaten anything for three days. It floats on the surface with difficulty, there is enough air. There is no external damage and swelling. Help if you can still, it’s a pity to lose fish.

Being a conscientious and sensitive person, I gave her a plan of action and events according to the full scheme, advised the preparations. And then, when I wrote everything, I thought - why should I treat it so radically, maybe the reason for the poor health of the fish lies on the surface? :)

In this connection, I asked a citizen: "Tell me, what is your aquarium volume, who lives there besides the telescope, etc."

When I received the answer, I just went nuts! I’m trying to get along with treatment and help, but it turns out that ... read the answer: "Aquarium 80 liters. 1 gourami, 2 thorns, 2 gold, 2 telescopes (1 patient, another healthy, but for some reason does not grow), 2 danios, 2 small antsistrus, 2 speckled catfish, 1 angelfish, 2 ampoules ... ".

The reason that the telescope was bad - was revealed !!!

Imagine if 16 people planted in an eight-meter hut, how much would they stretch? ... Whatever the conditions in this hut, the sea would start a month later.

Vendors of pet shops are selling fish to beginner aquarists, using their insatiable desired “I want this fish, this one and that one and those catfish”. At the same time, neither of them think about the further fate of the fish.

Sad! But for some reason, this is exactly the fate of "cramming nevpihuemoe" comprehends only aquarium inhabitants. Imagine, mother and daughter come to the pet store and say: "Give us 15 cats, 3 Yorkshire terriers, 5 chinchillas and one sheep-dog and 2 more parrots do not forget." Unfortunately, with aquarium fish this is exactly what happens.

And then, after a while, a convulsive scripture begins and the search for an answer to the questions: why the fish die and die, why do the fish lie at the bottom, float or swim on the surface, do not grow and do not eat!

HERE'S OWN, WHAT HAS BEEN AWARDED ME WRITE THIS ARTICLE!This is some kind of attempt to stop the mockery of fish! An article for future similar questions. An article that will somehow help newcomers and people who are going to buy an aquarium to understand that the fish are the same living things as we do - they grow, require certain conditions of detention, have their own characteristics, etc.

Very clearly, this problem is visible in Goldfish (pearls, comets, telescopes, veils, shubunkin, oranda, ranch, koi carps, etc.). People either do not know or do not understand that this family of fish belongs to large species. In fact, they need to be kept in ponds (as it was in Dr. China) or in large aquariums.

But it was not there! People for some reason have developed a Hollywood stereotype that Goldfish looks beautiful in a round small aquarium.

HOWEVER, THIS IS NOT THE CASE!!! The minimum volume of an aquarium for a pair of goldfish should be from 100 liters. This is the minimum in which they can live normally, and it’s not a fact that they will grow "to their full height."

Therefore, recalling the above example with a citizen, which has an 80-liter aquarium, in which: 4th scrofula, scalar, gourami and others ... it is not surprising to hear "My golden fish does not eat anything, lies at the bottom or swims belly to the top." And it touches the question, why do they not grow?))) But how can you grow here, you wouldn’t die!

In addition, in this example, there is a relative compatibility of fish. We must not forget that Scalaria is a peaceful, but still South American cichlid, and somehow it’s not a friend with goldfish. The same goes for the gourami - they are peaceful, but snooty individuals come across.

Summarizing what has been said, I earnestly ask everyone not to violate the norms and conditions of keeping the fish.
Do not be greedy!
And then your fish will grow beautiful and big.

Somewhere I read that for 1 cm. The body of a fish without a tail should have 2-3 liters of water in an aquarium. Who cares here is a link to the selection - How much can the fish in an aquarium X liters (at the end of the article, select the aquarium of the desired volume).

Now I would like to talk about other reasons that lead to poor health of fish, without any visible reason (signs of the disease are not visually visible).

If the norms of the volume of the aquarium are not violated, the compatibility of the fish and their number are not violated, and the fish still float or vice versa lie at the bottom and swallow air, then the reason may be:

Poisoning fish with nitrogen, ammonia,
and more simply poop

We live in the air, and the fish in the water. Parameters of aquarium water directly affect the health of the fish.

В процессе жизнедеятельности аквариумные рыбки и другие обитатели испражняются, отмирает другая органика, разлагаются остатки корма, что приводит к чрезмерному насыщению воды азотистыми соединениями, которые губительны для всего живого.

Таким образом, причинной плохого самочувствия или мора у рыбок, могут быть:

- отсутствие ухода за аквариумом (уборки, чистки, сифонки, отсутствие фильтра или подмены аквариумной воды).

- перекорм рыбок (наличие в аквариуме не съеденного корма).

- несвоевременная утилизация мертвой рыбы и др. (некоторые новички наблюдают, как улитки лопают умершую рыбку, этого делать категорически нельзя).

What to do in this case? It is necessary to eliminate the sources of nitrogen excretion:

- urgently transplant fish into another aquarium with clean water;

- strengthen aeration and filtration;

- to clean the aquarium, and then replace it? aquarium water to fresh;

- fill in the filter aquarium coal;

It should always be remembered that Aquarium water needs to be replaced weekly. However, this is not always good - old water is better than fresh, especially for young aquariums, in which the biobalance is not yet tuned. So this should also be done with the mind and as needed. If you see that the water in your "young aquarium" is not green, not muddy, etc. Replace at the beginning of 1 / 5-1 / 10 of the volume of aquarium water. However, one should always keep in mind that clear water is not an indicator of its purity. With that said, it is necessary to develop your own “tactics” of water changes based on the volume of the aquarium, its age and fish preferences, etc.

Emergency fish transplant - This is a temporary measure, if the fish is very profitable. As a rule, when a fish is not feeling well (lying on the bottom, swallowing air, swimming on its side, etc.), such an action brings it to life and after 2-3 hours it is cheerful and cheerful.

It should be remembered that such a transplant should be done in the water at about the same temperature as in the aquarium, the water should be separated (preferably), do not forget to provide aeration. And yet, if there is no other aquarium, an emergency temporary transfer can be carried out in a basin or other vessel.

About coal. Aquarium coal is sold in any pet store. It is not very expensive, so I recommend to buy it in reserve. Coal - this is a great additional measure in the fight against "shit and other evil spirits." If it is not at hand, you can temporarily take human activated carbon, wrap it in gauze or bandage and put it in the filter.

There are also so-called ion-exchange resins, for example, zeolite, they also refer to absorbents as coal, but they work, if you can say so at a more subtle level — removing nitrites and nitrates from the aquarium — decomposition products of ammonia, which in turn is formed from dead organics and waste products of hydrobionts.

Water filtration. It's simple. The aquarium filter must be suitable for the volume of aquarium water. Additional helpers: aquarium plants, as well as snails, shrimps and crustaceans.

In the end, we can advise the drug for quick cleaning of the aquarium from sewage - TetraAqua Biocoryn.

Another reason that the fish die can be the wrong adaptation of newly purchased fish.

Well, firstly, you should not release new fish immediately into the aquarium. Everyone knows that. Let them acclimatize: Therefore, see the article All about Purchasing Transplant Fish Shipping!

Secondly, the fish that lived in the pet store or grew up in another pond got used to certain water parameters (pH, hD, temperature) and if you transplant them into water with radically opposite parameters, this can lead to their death in a day or a week.

Actually therefore for the correct adaptation there are so-called quarantine aquariums. You kill two birds with one stone: check whether new fish are contagious and adapt them to new conditions. The quarantine principle is simple - it is a small aquarium (another reservoir) into which new aquarium inhabitants are launched and within a week they are checked for lice, as well as they gradually add aquarium water from the aquarium in which they will live.

You can do without quarantine, but it is a risk! As a rule, it carries in 80% of cases, but 20% still remain. To neutralize these 20% I recommend to transfer fish with the drug company Tetra AquaSave (Tetra AquaSafe), read here DRUGS AND TETRA AIR CONDITIONERS. This preparation "improves" aquarium water and reduces the stress of fish during transplantation.

The third reason that the fish is bad is asphyxia, caused by the lack of sufficient aeration of aquarium water.

The obvious signs of asphyxiation (suffocation) in fish are: frequent opening of the mouth, heavy breathing, wide opening of the mouth - as if yawning, the fish swims near the surface and there is enough oxygen.

You should know that the fish breathe oxygen dissolved in aquarium water, which they pass through the gills with water and if it is not enough of the fish simply suffocate.

Enhanced aeration and bringing it back to normal will correct the situation!

Another - the fourth reason for the ascent of the fish with a belly to the top can be the use of tap water

Opinions on this are different. While talking and discussing this topic, some comrades say: "Yes, all this is fikhgnya, I fill in the unstable tap water in the aquarium and everything is fine - the fish will not die." However, it is worth noting that tap water in many regions of the CIS is simply terrible! It contains so much bleach and other impurities that it is scary to use it. Somewhere, of course, the water is better here and “carries” - the fish do not die. In the Czech Republic, for example, tap water is generally spring water from the Karlovy Vary sources, but alas, where is the Czech Republic, and where are we ?!

Therefore it is very important to use only separated water for the aquarium. In addition to the fact that chlorine will evaporate from the water and heavy impurities will settle, excess oxygen will also be released, which are no less destructive for fish.

What to do if you poured tap water and fish from this poplohelo? Ideally transplanted into separated water. However, if you originally poured water, then you probably do not have separated water. One way out is to add aquarium chemistry that stabilizes the aquarium water. For example, the aforementioned Tetra AquaSafe or TetraAqua CrystalWater.

The fifth reason for the death of fish - a violation of the temperature

The generally accepted temperature measure of aquarium water for many fish is 25 degrees Celsius. But too cold water or too warm leads to all the same symptoms: the ascent of the fish, lying on the bottom, etc.

With cold water, everything is clear - you need to buy a thermostat and bring the reduced temperature to the desired one. But with too warm water is much more complicated. Usually aquarists encounter this problem in the summer, when the water in the aquarium boils and rolls over 30 degrees, from which the fish become lethargic and "faint."

There are three ways out of this situation:

- cool the aquarium water handicraft: using frozen 2n. bottles from the fridge. But - this is not very convenient, because frozen water quickly gives off cold and you need to constantly change the bottle. In addition, jumps and temperature fluctuations - there, no less harmful than just elevated water temperature.

- sold special installation cooling aquarium, but alas, they are expensive.

- buy an air conditioner and install it in a room with an aquarium, in addition to room stuffiness, the air conditioner will knock down the aquarium heat. The last option in my opinion the most acceptable.

The sixth and seventh reason

Sometimes the cause of bloating the fish and swimming a belly or side to the top is overfeeding. Again, this reason is largely related to goldfish, because they suffer from gluttony, overeating and begging. Do not enter them on occasion. Feed them exactly as much as it should be. Otherwise, your gluttons will earn inflammation of the gastrointestinal tract or, more simply, they will suffer from constipation!

Another reason for which the fish can lie down for no apparent reason is stress. Well, do not like her neighbors and that's it. Or it often happens that they take young fish, and all the boys and one female grow out of it, and as a result, the boys start a showdown - who is in charge. The weak begin to chase and tyrannize, with the result that they are hammered into a corner, lie on the bottom, well, and die. There is only one way out, to resettle everyone, give them to friends or back to the pet shop.

What else can affect the health of fish:

- Excessive lighting or stress from it;

- decorating the aquarium with chemically dangerous decorations (metal, rubber, plastic);

- overdose of drugs;

Summing up, it is possible to make an unequivocal conclusion that the correct maintenance of fish is a panacea for many aquarium ills. If you are attentive to your aquarium dwellers, they will thank you too.
beauty and longevity!

We also recommend that you read the brochure Navigator 3: an interview with an ichthyopathologist. Below is a link to the pdf-version, which you can download, as well as its test version.

To read and / or download the Navigator

click on the picture below

If you do not have a PDF reader installed, we recommend that you use AdobeReader by downloading it from the official site.

Useful video about the treatment of fish, which will help solve the question of what to do with a dying fish?

Video section of the site on the treatment of aqua fish

Why die aquarium fish? What to do?


You have a good set of fish, it turns out, there are quite a lot of them. Maybe. xilorodane is enough, for 1 cm of fish there should be 2 liters of water, with a constantly working aerator it can be reduced to 1 liter. Water as you defend? Stress is possible when transplanting to an aquarium, even if your conditions are better than those in which the fish used to live, all you need to do is give them the opportunity to get comfortable with it for about 10-20 minutes. They should be lowered into the water gradually, so that the shock does not occur due to a change in temperature, water hardness, etc. The temperature is very important, for your fish 24-28.
In general, the death of fish is a common thing for a beginner, my first two months were also constantly dying. Gain experience and everything will be fine. The main thing is not to despair and not to give up such a good thing as aquarist!
Correctly spelled - mollies.


Maybe one of the fish was infected and the other infected. Seat all the fish in separate jars, let them sit for a couple of days and change the water in the aquarium. You can buy specials. solution that kills the disease and add to the water. Contact your nearest pet store, they will advise you what to do and how.

Tatyana Komarova

Do not buy plants, they are infected with sores. from which the fish die. You can purchase a solution of "blue" in the pet store, drip 10-15 drops. Or at the very least, to purchase both fish and plants, all together, not separately !!!!


Check the temperature, oxygen, water PH - special indicators are sold in pet stores. Calculate whether your aquarium is overpopulated - sometimes the fish die from lack of space, personal territory.
If before the death of the fish you have someone hooked up - an infection is possible. If there are no more accurate symptoms, buy generic drugs (although this is not the best option).
In addition, since the aquarium is only a month old, the microflora and the environment are still normalizing. I was with the first aquarium population.


Have you defended water directly in aqua for 3-4 days? Perhaps due to the toxicity of glue this happens. In general, it is necessary to prepare an aqua to launch fish for about 2 weeks or buy special products in stores that speed up the process of becoming a normal aquarium environment ... Read on the forums ...
Now I advise you to re-wash, and it is better to boil the soil, re-defend the water in aqua 5 days and run the fish ...
In general, it is strange - you had unpretentious fish ...

Elena Grigorieva

For beginners, this is a common situation. My first two aquariums grunted, then I treated the fish for a long time, when everything settled down, the problems disappeared. First, check whether the tails and fins of the fish are visually clean, if there are any blotches, this is a disease. Even if the water is defended when the water is poured into the aquarium, air bubbles appear on the walls, turn on all the equipment and let the running aquarium stand. bubbles on the walls will not disappear, if they plant algae, they are planted before running the fish, but I refused to live algae, I have an artificial low-cost and it’s not a bad thing to throw it away, but they look like real ones. Do not transport fish in cans, there are special bags that are pumped with air when you bring them home. Put the preparation of Stres Zoom in the container. It helps to transfer stressful situations to fish and restores the skin damaged during transportation. When you transplant fish from the tank to the aquarium, you need to equilibrate the temperature. Good luck.

Die guppies in the aquarium! Why?

Irina Shnidrova

It is necessary that the water was settled. They bought fish where the seashells disappeared, they began to clean the shells and saw the horror there was a fish with a belly full of holes (it turned out there were predators). Due to the fact that the water was hot, some fish jumped out of the aquarium.

Prince of Wales

nothing can boil ...
1. Remove all the shells, they make the water hard.
2. Do not do a spring-cleaning in the aquarium once a month. Better every week little by little.
The key to success in aquarism is the ability to grow plants. If you can not maintain a biobalance sufficient for plants, then you can not contain fish.
In fact, everything is simple. It is necessary to stop thinking in terms of sterility. There is no sterility in nature. Totally. And every time you step on the same rake.


Let's start with the fact that 8 liters is not the volume for a normal aquarium. More precisely, the volume, but for an experienced aquarist. In small volumes it is very difficult to maintain the biobalance. The literature advises beginners to begin (sorry for the tautology) with 100 liters. I start with 60, which also turned out to be not bad. Indeed, the more a bank, the less problems with it, the better everything works in it (if you have the necessary equipment). Here they have already said that it is not necessary to arrange a gene-cleaning every time. In one of the options, the water should be drained once a week, a third or a quarter with simultaneous siphon of the soil. In a small aquas, this will also be a problem - thrust a siphon, here, in fact, a third has merged, if not more. The fish must be properly transplanted, and not immediately tossed into new water. Information on the forums of the sea, just do not be lazy to read. Here you have good sites -,

Elizabeth Halliwell

8l - not an aquarium, but a can of water. Balance can not be achieved and maintained in such a volume.
For beginners from 30-50l
8 l for a maximum of 2 male guppies.
Nothing to blame for the disease - die from poor care

Why does the fish die? (One by one every day. What can it be like?


you need to try to feed 1 time a day with not a large amount of food so that it is quickly eaten, gradually change the water to a settled minimum of 1/3 every other day, it also matters what fish are in the aquarium can be predators or incompatible. You can go to the aquarium sites there are a lot of useful information, I highly recommend.

little wife

most likely sick, do not buy new fish for now, otherwise they will die for you every day ...
Get rid of everyone right now (or let them live until they die), then clean the aquarium, pour in new water, and launch new fish ...
I was so


Once they began to die so quickly, it is most likely from overfeeding. All food should be eaten in one minute. Now you need to change the water (50% daily). Water can be poured directly from the tap with a thin stream, only you need to adjust the temperature. If the volume of water is small, it is better to defend it during the day in a bucket. It is impossible to completely change the water and wash the filter under the tap, since all the beneficial bacteria that process ammonia and nitrite will die.

Diva Natalie ™

Maybe a little off topic, but can you bring something from the area of ​​mysticism about the cause of the death of fish?
In Hong Kong, it is commonplace to keep goldfish in a home or office, and wealthy people can afford to keep a fish called “arrova” specifically for Feng Shui purposes. This is a very elegant “dragon” fish, which is also called “Feng Shui fish”. Their usual habitat is the deep Pahanga River, and the color is silver, which this fish usually changes to red or gold, when its owner is expected by inconceivable wealth, which, accordingly, affects the market prices at which it is sold. At home, they are kept either one at a time or in groups of five or nine. In addition to wealth, fish symbolizes success in exams and career. The Chinese legend speaks of carp, which, as it drifts, reaches the Golden Gate, overcomes them and turns into a celestial Dragon. It symbolizes a student who passes state exams, enters a period of wealth and success as a public servant. Fish means achievement, therefore pictures and statues of fishermen fishing are a symbol of knowledge and victory. Chinese New Year cards also contain this theme. Keeping fish in an aquarium with water saturated with oxygen stimulates the creation of energy, life and activity. Masters of Hong Kong recommend the following ratio of fish: eight gold or red and one black, totaling the number nine. Eight goldfish symbolize growth, development and prosperity, and black - protection. The Chinese believe that when misfortunes knock on a house, it protects the residents, collecting all the hostile influences, so if a black fish dies, then this is a sign that its owners have avoided very unpleasant events.