What kills aquarium fish. Why do fish die in an aquarium and what can be done

A pestilence of fish begins, the first reaction of the owner is to run to the aquatic store in search of a remedy for this disease and misfortune ...

But, most often, this only worsens the already unstable situation in the aquarium, and the dying of the fish begins to happen faster.

Here you can not fuss and you should clearly define the problem due to which the fish float up belly up ...

In most cases, aquarium fish die either because of the quality of the water in the aquarium or because of the epidemic of harmful microorganisms that you have bred by slaughtering the aquarium and its maintenance.

Let's explore the main reasons for the sudden pestilence of fish

The leading cause of death for aquarium fish is poor quality water in the aquarium due to:

• insufficient filtration
• Insufficient water change
• Insufficient disposal of waste from water and soil
• Too many fish in this tank
• General pollution

Many novice aquarists do not understand exactly what water parameters you need to pay attention to in this case. The three most important:

• Ammonia level
• Nitrite level
• Nitrate level

Ammonia, nitrites and nitrates are derivatives of nitrogen compounds that appear in the aquarium in the form of fish waste and food decomposition. Most fast way to check these parameters is to use water sample tests, which you can find in any aquatic store.

It is very important not to rush to buy antibiotics and other medicines for fish. With them you will completely achieve the biobalance of the aquarium.

Non-zero levels of ammonia and nitrite also appear in any newly started aquarium.

Same increased content these nitrogen compounds is a problem in older aquariums, which long time worked without water changes.

But fish don't die because of elevated values nitrites, and how much from the weakening of the body and the inability to fight harmful microorganisms:

The fish are dying in the new aquarium. I just launched it!

It often happens that fish die in a new aquarium that has just been launched. Here the problem lies in several factors.

All fish produce ammonia as a waste product. Urine that is. They also eat fish, and if they do not have time to eat what the owner threw at them with a generous hand, then the aquarium will quickly appear a large number of rotting food.

Eliminate similar phenomenon the nitrogen cycle is called for, but in the new aquarium it simply has not yet appeared, as well as the beneficial bacteria necessary for the consistent decomposition of waste.

All this leads to the appearance of highly toxic nitrogen compounds, which ultimately leads to the death of the fish. To correct such a sad situation in a new aquarium, several actions should be taken:

• Stop feeding the fish in the new aquarium. Do not be afraid, the fish can perfectly do without food for several days.
• Change some of the water in the aquarium. The higher the level of ammonia and nitrite you have shown tests, the more you have to replace.

For readings of 1-2 ppm, feel free to change half the water. And this should be done daily until the tests show you normal level ammonia and nitrite. As the level of poisoning decreases, reduce the volume of water changes.

Fish are dying in an old aquarium. But was it still okay?

Old tank syndrome occurs in well-established tanks with perfectly functioning natural biofilters. In it, over time, ammonia and nitrites are processed into nitrates, which, when high concentration, will cause poisoning and death of aquarium fish.

The treatment method is the same as above: reducing the amount of food for the fish, changing the water and cleaning the soil. Pay attention to the ground Special attention, food particles can fall into the voids of the soil, where they will simply rot, and not be processed by bacteria. A good help, after the stabilization of the situation in the aquarium, can be an increase in the number of plants, because they perfectly consume nitrates, which are an excellent fertilizer for plants.

How to keep aquarium fish healthy?

This is based on several pillars of the aquarium trade: regular water changes, feeding the fish without excess, filtering the water in the aquarium, timely cleaning of the soil from accumulated waste and dirt.

If only one fish dies in the aquarium, and the water looks clean, it is not necessary to change it, because after changing the water it will be necessary to wait for the restoration of the ecosystem and biological balance. Therefore, it is enough just to add fresh water, updating the old one. If the fish died from infectious disease or has lain in the aquarium for several days, the water should be replaced, while washing the aquarium.

When topping up fresh water, at least one third of the old water should remain in the aquarium - while fresh water should have similar hardness and temperature.

If the aquarium still needs to be cleaned, all living fish and plants must be removed from it, washed, disinfected and dried. After that, it is poured into the container new water. In the first few days, a short-term bacterial outbreak with cloudy water can be observed in the aquarium - do not worry, it will pass by itself. After that, as the water becomes clear again, you can return the plants to the aquarium, and it is advisable to start the fish in about a week. Water changes are often the most effective tool to get rid of bacteria, but for fish this is a huge stress, so you should not abuse it.

How to change water correctly

An electric or vacuum pump is great for changing the water in an aquarium. The siphon will also cope well with this task, with the help of which the walls and bottom of the aquarium are easily cleaned of food residues and plaque. To prevent the water from turning green, the aquarium should be placed away from sunlight and turn off artificial lighting at night. In addition, you need to periodically remove excess plants from it and feed the fish less so that the water is not contaminated with food residues.

Ancitrus catfish, which slide along the aquarium walls and eat plaque on them, will also help purify the water.

A partial change of water in the aquarium should be done every week, changing it to 1/5 of fresh water. In order for the water to always be clean and transparent, shellfish and daphnia should be introduced into the aquarium. Many aquarium owners try to clean the tank glass with snails, but they do not do it very effectively and they also shit a lot. Problems with water are usually typical for "young" aquariums - subsequently their own ecosystem is born in them, the situation normalizes on its own. The main thing is to follow the rules for the care of the aquarium.

Mini aquariums are an attractive interior decoration. But unlike large tanks equipped with everything necessary equipment, there are some problems with care. If you follow the basic rules, including the replacement of water, you can avoid the flowering of the aquarium and create quite tolerable living conditions for the fish.

You will need

• - soft settled water;
• - net capacity;
• - bucket;
• - scraper.

Instruction

It is believed that small aquarium easier to maintain than a big one. However, this is the first misconception of inexperienced aquarists. It requires more frequent water changes, since fish waste decomposition products accumulate here most of all. In addition, intensive plant growth can cause a lot of trouble.

Water for replacement should only be soft, room temperature, so you should have a constant supply. Collect tap water only in clean containers that should only be used for this purpose. It is necessary to defend the liquid for at least three days.

Scoop up the required amount of water with a special ladle with a long handle. Scrap the sides of the aquarium with a scraper and add fresh soft water. Then fill a clean bowl with water and leave it to stand until next procedure.

Aquarium water evaporates very quickly. Check the level regularly and top up if necessary.

It is necessary to completely change the water in the aquarium as rarely as possible, as this violates the biological balance. However, it is necessary once a year to replant the plants and clean the aquarium walls and filter.

To replace the water completely, remove the fish and place them in a jar for a while. Drain the liquid with a hose. Remove excess algae. Clean rocks and aquarium walls.

Then pour in the distilled water. Add bacteria and let the tank stand for a couple of days, then put the fish in it.

note

For living in a small space, choose guppies, gourami and tetras. These fish do quite well in mini aquariums. You can also put a cockerel in the pond, neon lights look beautiful. If the fish have grown to a fairly large size, they need to be planted in a container. bigger size.

Helpful advice

Not only fish, but also other marine and freshwater inhabitants, such as shrimps, look very impressive and feel good in a small aquarium.

A clumsy attempt to clean the aquarium can turn into the death of everyone small fish and the plants in it. Many beginner aquarists mistakenly believe that frequent change water contributes to maintaining a normal biological balance for fish. But the water evaporates, and dirt and slime can appear in the aquarium ...

You will need

• - settled tap water

Instruction

To maintain a stable "fresh" mode, do not change, but add water. The volume of tap water should not exceed 1/5 of the volume of the aquarium. Otherwise, the hydrochemical "old" water changes dramatically, and then your pets can get sick or float up belly up.

Remember, the main thing is not, but control over the environment. Even a small change of water (1/5 of the volume) brings "stress" for the inhabitants of the aquarium, but after a couple of days the biological balance is restored. If you change half of the water, then the balance will return to normal in about a week, but some of the fish and plants will inevitably die. According to the website www.fishqa.ru, completely change water possible in exceptional cases: due to soil contamination, darkening, the appearance of mucus or harmful microorganisms. Otherwise, with the right long-term balance, the plants and microorganisms themselves serve as a biological filter.

The aquatic environment is formed during the first two months, therefore, during this period, add water it is forbidden. When the young one has formed, add water no more than 1-2 times a day, periodically cleaning the glass and collecting debris from the ground with a hose. For a volume of 20 liters, add settled tap water water, preferably a little warm (up to 40 or 50 degrees). After a year, clean all the soil so that the optimal environment does not age.

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Helpful advice

If you decide to start a fish for the first time, then www.fishqa.ru experts recommend starting not with a traditional aquarium of 20-30 liters, but with a small reservoir of 100 or 200 liters. It will be much more difficult to destroy its biological balance by adding water each time, and you will learn correct content the fragile world of exotic underwater inhabitants.

Sources:

• www.fishqa.ru
• how to change fluids in 2019

The health of the fish and other inhabitants of the aquarium directly depends on the quality of the water. You need to change it several times a month, topping up a small part each time. Tap water must be defended, and only after that you can plant algae and underwater plants in it, as well as run your pets.

You will need

• - capacity for water;
• -siphon-nozzle or plastic tube with a diameter of 1-1.5 centimeters;
• -additives to neutralize harmful substances (optional).

Instruction

Dial right amount water and defend it for at least 5-7 days. In the event that the deadlines are running out for you, after 1-2 days filter the water through Activated carbon or boil for 10 minutes. However, you must remember that in the process of boiling water loses oxygen and it must be aerated. Defend water only in enameled or glass containers (enamel must be intact). Undesirable, but you can still use plastic bottles for settling. Put the collected water in a place where it will not fall on Sun rays.

If your aquarium has soil, drain some of the old water using a special siphon nozzle. Otherwise, you can also use a small diameter plastic tube (1-1.5 centimeters). Be sure to put gauze on the end of the tube lowered into the water so that the fish do not get sucked into it. Do not forget about the walls of the aquarium, if they are very dirty, you must clean them before changing the water. Topping up water is carried out only partially, at a time you can change no more than 1/3-1/5 of the volume of the aquarium. You should carry out a complete change of water only in extreme cases, such as: the appearance of fungal mucus, the introduction of unwanted microorganisms, high soil contamination, etc.

To fill a new aquarium, defend the water for at least 5 days, then pour the prepared water into the aquarium, plant the plants and start the fish. If you want to speed up the establishment of a normal environment, add some water and soil to it from an already established well-organized aquarium in which there is a ready-made complex of microorganisms. Optionally, you can purchase special additives that neutralize harmful substances in the store, when using them, the water will not need to be defended.

note

Do not overfeed the fish, it is erroneous feeding that most often causes spoilage environment in aquarium.

Helpful advice

In order to check good water in an aquarium or not, inhale some air from its surface. The smell should be light and unobtrusive. Impurities from odors indicate that unfavorable processes are taking place in the aquarium. Topping up water is best done once a week.

Sources:

• How to change the water in an aquarium
• Aquarium water
• how to change water in aquarium

The aquarium periodically accumulates waste products from fish and microorganisms, as well as harmful substances such as phosphates and nitrates. A partial or complete water change will help get rid of them.

You will need

• - watering can;
• - 2 clean buckets;
• - 2 m aquarium hose or soil cleaner;
• - towel.

Instruction

If you have just purchased an aquarium, planted aquatic plants and launched fish into it, then you should not change the water in it for the first two months. At this time, the environment is not yet stable and it is not yet necessary to interfere in the formation of the microclimate.

After a couple of months, you can start replacing the water. Experienced aquarists advise to resort to a complete water change in the aquarium as little as possible, but to change a small amount of water, approximately 20% of the container volume, should be done at least once a week.

To do this, you need to prepare the water in advance. Collect it in clean plastic buckets that should only be used for aquarium work. However, they should not be washed with any cleaning agents, as they can have a detrimental effect on aquarium inhabitants. Let the water sit for a couple of days. During this time, harmful substances such as chlorine will disappear. The water will become softer and reach the optimum room temperature. Strain the water, if necessary, to remove impurities.

Hello dear friends!

Many beginner aquarists very often ask why are dying, although, in their opinion (I mean - in the opinion of beginners), they are doing everything right, according to the book. In this article, I will try to highlight the most common mistakes that beginners make. So!

1) The first thing that beginners do not pay attention to is the recommended water parameters! Friends! Hard and soft water are as different from each other as white and black! And if you put a fish in unacceptable water for it, then consider your the fish died! Therefore, I strongly recommend that you strictly follow the recommendations for observing water parameters!

2) The second common mistake is ignoring the water temperature. Beginners believe that a difference of one or two degrees for fish does not play a big role. How they play! Guys, fish are not people, they are so sensitive to water that you can't even imagine! Therefore, for them, “plus” or “minus” two degrees are also noticeable, as for you and me + 10 * C or -10 * C! Keep this in mind and then you will have much less problems!

3) The third mistake is the neglect of aquarium lighting. The fact is, friends, that for most tropical fish daylight hours last 10 - 12 hours. Our daylight hours are somewhat shorter, especially in winter time. And if the fish won't get enough light, then her The biological clock just break down. And since the fish is a fragile creature, such a breakdown is followed by death. Keep this in mind for the future!

4) Another reason for the frequent death of fish is the incompatibility of species. And this applies not only to carnivorous and herbivorous fish. There is also the factor of nitrogen tolerance. For example, if some fish do not react to an increase in nitrogen concentration in any way, then others die from acute poisoning nitrogen! There is only one advice in this case: study the features of each species before combining them in one aquarium!

5) And here is another reason - the overpopulation of the aquarium! Quite often, beginners lodge in one small-sized one. Plus, they also throw plants from a cubic meter! As a result - overpopulation, lack of oxygen, and - hello! Here's an unspoken rule for you, friends: one fish has at least 3 liters of water! And this is for the smallest! The volume increases depending on the size. Consider this factor too!

6) Not proper feeding is also a common cause of massive fish deaths. For some reason, beginners believe that it is enough to throw a pinch of dry food into the aquarium and it's all in the bag! This is absolutely wrong! Fish need to eat a variety of foods! And if they eat only dry food, they will die very soon from inflammation of the stomach and intestines: dry food is very hard to digest! Diversify the fish menu: give them both dry and live and vegetable food! For example, many fish love lettuce leaves that need to be chopped.

That's all, dear friends. I really want you to draw the right conclusion from everything that you read in this article. And remember: if you are too lazy to take care of the fish, then you should not start an aquarium!

All the best to you and see you in the next articles!

Most aquarium inhabitants need careful care. This concerns the quality and composition of water, neighbors and vegetation. If the fish in the aquarium began to die, most likely they were not observed the necessary conditions content. To avoid similar troubles, it is worth familiarizing yourself with the list in advance, which indicates the most common causes of the death of fish.

Why do fish die in an aquarium?

1. Like all the abodes of our planet, fish need air, they need water aeration. Always check the cleanliness of the air and water before settling in. Fish often die in an aquarium from lack of oxygen. This happens when you put a lot of inhabitants in an aquarium that is too small.
2. But even if all the rules are observed, sometimes the fish die immediately after settling. This is due to the fact that they have a simple adaptation shock. That is why release in community aquarium pet immediately after purchase is not allowed.
3. The next reason why fish die in an aquarium is the introduction of a disease. As a rule, you will notice a gradual deterioration in the condition of the fish, with the disease spreading mainly to one species.
4. Never neglect aquarium lighting. This is especially true for lovers of colorful tropical species. Light day for such fish should last about 12 hours. With a lack of light, the pet's biological clock will break, which will lead to death.
5. The temperature is just as important as its composition. It is generally accepted that a couple of degrees will not be able to significantly affect the condition of the aquarium inhabitants. Meanwhile, the fish are very sensitive to the slightest temperature changes, so that constant fluctuations in degrees can be a serious threat.
6. Fish die in an aquarium if the recommended water composition is not followed. When buying a new species, be sure to carefully study the water characteristics that are recommended for it. The hardness of the water 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 when incompatible species are settled. This statement is true for both carnivorous and herbivorous species. And sometimes only one species of fish perishes in the aquarium, while the rest feel quite normal. It is likely that there have been changes in the composition of the water, which are insignificant for some fish, while for others they have become the cause of death.
8. If fish die in a new aquarium and all water parameters and selection rules are observed, you should pay attention to the feeding regimen. Beginners often make do with dry food only and throw in a handful of pellets. After a while, from such a regimen, the fish have inflammation of the stomach and they die en masse. In fact, your pets need a varied diet. Bring vegetable and live to the menu.

Why do fish die in an aquarium: forewarned is forearmed

To avoid such problems, it is necessary to take the filling and maintenance of the aquarium seriously. Before you go in search of fish, do not be too 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 from the seller at the pet store.

Most often, the reasons why fish die in an aquarium are associated with violations of the content. Always keep all water parameters in the aquarium under control, 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 short time. The fish cannot tell you, but by its behavior you will always notice that something is wrong.

ooops!!! - there are options, choose the one you need:
- you have a new aquarium that you settled 10 - 40 days ago, then read ;
- Your aquarium is more than 3 months old and at first everything was fine and suddenly it started... read ;
- I know what it is and successfully carried it out, I know how to take care of the aquarium and I do it regularly, but then I bought new fish, and then the fish began to die ... well, we sympathize, the fish will have to be treated, oh this is told.

Your fish die in a new aquarium or in a well-washed and/or refurbished old one.

If so, then continue reading this section of the article. To prevent the fish from dying, the aquarium must be equipped with a filter (if not, then) that do not turn off at night(if turn off, then ). The aquarium should have round-the-clock aeration, and then the fish do not suffocate ("do not smoke" at the surface of the water). If the fish stand near the surface and breathe heavily even with aeration turned on, even if not all the time, but only after feeding, then. The water looks clean and clear, no and, but the fish still die. Why? The fact is that the aquarium did not and did not work out in it. What to do?

• Change a quarter of the water. Buy and add ammoloc or anti-ammonia to the aquarium - these drugs will make non-toxic metabolic products of fish and harmful substances in tap water. In the future, make changes (20% of the volume) and apply one of the indicated preparations in two days to the third at least 4-5 times, then switch to weekly water changes without the above preparations.
• Immediately buy a bacterial starter (any of the following: denitrol, safe start, nitrivek). Pour beneficial bacteria twice the dosage indicated on the package after each water change. During this time, feed the fish very sparingly.
• After the first water change, add to the aquarium table salt in the amount of one third of a teaspoon for every 25 liters water available in the aquarium. Example: in a 100-liter aquarium there are 80 liters of water, then add about 1 teaspoon of salt without a slide (pharmaceutical accuracy is not required here). For further changes, add salt at a dosage of 1/5 teaspoon for every 25 liters of water, poured into the aquarium. Example: in a 100 l aquarium we change 25 l of water, then we add one fifth of a teaspoon of salt. Stop adding table salt after five changes.

Follow this scheme and the fish will stop dying. If you have any questions, then ask them at. If you want to know more about and, feel free to click on the links, everything is clear there written.

Everything was fine in your aquarium, but gradually, something went wrong and now the fish began to die.

Not all at once, but periodically, then one, then the other. And also steel. Vietnamese tassels increasingly cover the leaves of plants, equipment, decorations. Newly bought fish in the aquarium do not take root and die within a few days. Reason: a lot has accumulated in the aquarium. What to do? More often, admit it, because they did a water change well, if once a month, right? And you need once a week for 20%. If you change 20%, then, as a rule, you can not defend the water, but it is not harmful to use air conditioners (Stress Coat, Avera, AquaVital). When changing water, it is very desirable to siphon the soil. Don't know how to siphon properly? , everything is shown there. If you live in a region where the water is soft, for example, in St. Petersburg, and the soil in the aquarium is acidic or neutral (granite, basalt, quartz, special soil for plants; read about how many troubles happen from the wrong choice of it in the aquarium), then water in the aquarium is most likely acidic and too low. You need to buy it yourself and make sure that this is exactly what happened, or take the water for analysis, then I will tell you everything about your aquarium. How to raise the pH value in the aquarium? Can be used special remedy pH + (it is made by different companies, it doesn’t matter which one you use, you can), but this will be a temporary measure. To correct the situation once and for all, you need to add some coral chips to the aquarium. You can place it in one of the external filter trays, or simply put it on the bottom of the aquarium. For example, sprinkle a decorative path. For a 100 liter aquarium, 500 g of coral chips are needed. Example: there is an aquarium of 60 liters, the water in it quickly turns sour and guppies with swordtails die. It is necessary to pour about 300 g of coral chips on the bottom. The water will be corrected in a week, but do not forget to make changes anyway.
But what if you have already done everything described above, but it did not help: the fish continue to slowly die, and the nitrates in the aquarium are still high? It is possible that you have an aquarium. Read about the aquarium, it needs a special approach. And here I will advise you to use low-protein pellets (with large quantity herbal ingredients), if you soak them in before feeding, then you will soon be surprised at how muchthe health of the fish will improve.

R fish die because pathogens have entered the aquarium.

Aquarium fish, alas, can get sick. are quite numerous, but most often the aquarist encounters a few typical cases. And he is sure to face it if he buys new fish.