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Why cock fish lies at the bottom

maintenance, care, compatibility

The aquarium fish fighting cockerel needs full care and in proper conditions of detention. If these rules are not followed, the fish may become ill, with negative consequences. Diseases are easily transmitted to other fish that live in the same aquarium with a rooster, even if it is divided into two halves by a partition.

The treatment is simplified if she initially lives in a separate tank. If you observe: changes in the appearance, behavior and physiology of pets, it may be the symptoms of their disease.

  1. Symptoms of the disease appeared quickly, suddenly, and they showed up in other fish? Then the reason is as aquarium water. What to do: make measurements of water parameters using a water thermometer, litmus paper, pH value. Learn indicators of ammonia, nitrates and nitrites, temperature, CO2, oxygen. Be sure to change the water to fresh and clean.
  2. If symptoms of the disease appear in all fish, or in fish of the same species, it means that their organism is susceptible to infection. What to do: transplant diseased fish to a quarantine tank, do an inspection, diagnose all the symptoms, establish a diagnosis. Then you can treat.


Fin rot (Latin name: Aeromonas, Pseudomonas, Vibrio)

A terrible disease of the fish, which may be exposed to cockerels. Their fins are affected by pathogenic bacteria that completely destroy the structure of the fin.

Symptoms of the disease: clouding of the fins, their sticking, the appearance of a white border, ulcers at the base of the fins, the cornea of ​​the eyes may dim.

The main cause of the disease is improper care of the reservoir. A cockerel fish can get sick if:

  • Aquarium for fish overpopulated;
  • Water changes are rare or absent;
  • Residues of the feed are not removed from the ground; the bottom siphon is not produced;
  • The filter is bad or dirty;
  • The new neighbors of the rooster did not stay in quarantine, or the roosters were placed in an aquarium with sick fish.

See how to treat fin rot.

Even in an ideal, at first glance, aquarium, cockerel fish can get sick. Fin rot is an infectious disease that exists almost everywhere, and it develops rapidly in a favorable environment. Treatment of fish is permissible with the use of anti-fungal and anti-bacterial drugs, which allow in a few days to limit the growth of bacteria, after which the fish can be fully treated.

Preparations for treating fin rot in males: malachite green, Sera Baktopur, streptocid 1.5 g per 10 liters of water (baths), Tetra GeneralTonic (Tetra), Antipar, Fiosept, Tripaflavin. Can be used for the treatment of salt baths: for cockerel 7-10 grams of salt per 1 liter of water. They can be arranged 30 minutes a day.

All preparations for fish should be used according to the instructions for use.

Oodinum flagellum – the causative agent of the disease. The reasons for their spread are cool water, new neighbors untreated in quarantine, poor aquarium cleaning.

When a fish is sick, gray or golden nodules form on the edges of its fins. Then the scales exfoliate, the fins stick together.

Sick fish does not breathe, does not eat, moves in jerks, rubs against the bottom. The cockerel fish along with other fish should be treated in a quarantine tank, with heated water temperatures. They are treated with drugs Sera oodinopur, JBL Oodinol, Tetra Medika General Tonic, Ichthiophore, Formed or Antipar according to the instructions.

Also replace the water for small fish with clean, process all decorations and plants.

See also: Aquarium species of cockerels, Compatibility of cockerels with other fish and inhabitants of the aquarium.

Novice aquarists quite often encounter the phenomenon when a new fish launched into an aquarium lies at the bottom and breathes heavily. There are several explanations for this behavior, and in each case it is necessary to deal separately.

For example, you bought a “cinch” and, satisfied with your purchase, launch it into your home aquarium, expecting that it will please the household with its appearance. Not here it was!

She almost immediately goes down.

What is the reason for such unusual at first glance behavior? Why does a goldfish lie at the bottom of an aquarium?

In many cases, this phenomenon is simply explained: a new inhabitant of a domestic pond experienced natural stress or shock.

Yes, ornamental fish, falling into completely new conditions, often behave in the same way as people. They go through a natural stage of acclimatization.

Do not immediately grab his head! If the aquarium “works” as it should be, all the required conditions are maintained, then the fish purchased will get used to the new environment in 1-2 days, its health and behavior will be normalized.

However, it is necessary to observe her during this period as often as possible.

If you notice that your fish is lying at the bottom of the aquarium, do not despair – this does not mean that she is sick, or is about to die. Look at it, maybe it does not lie at all, but swims and studies the bottom, or digs up the soil.

Why fish often sinks to the bottom of the reservoir, and what the reasons may be for this – should be considered in detail.


For some species of fish, lying on the bottom is a natural behavior. If a speckled catfish lives in your aquarium, or another type of corridor, you will notice how it floats in the bottom layer of the reservoir. It’s not scary, just all the corridors, and catfish, too, live only in the lower layers of water.

As natural cleaners, they take uneaten food from the ground, scraping algae that have accumulated on its surface from the bottom.

Other species of fish also swim in the lower layers of the water – these are neons. As representatives of the Kharacin family, they are distinguished by their small size and sensitive body, which will irreversibly suffer with any damage.

The safest place for them is the bottom of the tank, where they will be comfortable and safe.

Look at the unusual behavior of the surgeon’s fish.

You can see how the fish of the family of Viunovye and Tsikhlida often spend time at the bottom of the reservoir. As you know, they love to dig in the ground and dig water plants. For them, there are other types of “entertainment”, but they are accustomed to this way of life.

There are no signs of illness here, they are simply looking for something, perhaps food, or cleaning the body of accumulated mucus. For loaches, it is important to free the scales from mucus, wallowing in stones or gravel — otherwise, one cannot avoid inflammation of the skin.

Many fish swim at night at the bottom of the aquarium. Why is this happening?

Everything is simple – this is normal. Like many living creatures, fish prefer to sleep at night, although there are exceptions.

They slowly drift in the bottom layers of the water, often with open eyes. And if they swim to the surface, then some pets can even be stroked.

Natural behavior – to be in the bottom water layers, when the fish recently settled in the general aquarium. For her, this is a new, unknown world that hides a potential danger. The adaptation process takes place in a secluded place where it is likely not to be noticed.

This behavior is typical if you have settled goldfish, tsikhlidki, kartozubye or labyrinth.


Now it is necessary to understand the reasons when a fish that does not live in the bottom layers of water swims in the “bottoms”. Pay attention to how much food you give to fish – if your pets overeat, their stomach does not have time to digest all the food, and there is heaviness in the stomach.

It is easier to move your stuffed belly to the bottom without rising higher. Overeating is followed by obesity, which is deadly for pets.

Reduce feed to a minimum, and put the fish on a fasting diet.

Another reason for this strange behavior is a disease of the gallbladder and the digestive organs. Usually they are accompanied by other symptoms.

For example, during infectious diseases, the fish begin to experience changes in the gastrointestinal tract. The fish is weakened, and begins to sink to the bottom. In case of hexamitosis, single-celled bacteria settle in the gallbladder of the fish, which aggravate its work.

As a result, inflammation of the gallbladder, blockage of blood vessels and death will occur. Time to diagnose the disease and begin to treat pets.

See how the fish has a swim bladder problem.

If the fish after the fight, or after active underwater games was on the bottom – examine her body. Perhaps she was injured and could not move. Unfortunately, such cases are almost incurable, but you can contact a specialist who can help.

Large fish are better wounded than small ones.

Pay attention to the condition of the water – perhaps you forgot to clean the aquarium? Remember, when was the last time measurements were made of the parameters of the aquatic environment: temperature, acidity, hardness, the presence of nitrites and nitrates, ammonia and chlorine.

If you find a violation – immediately correct. Under the wrong conditions, the fish sometimes swims on the bottom, and will wait for the moment when the water gets better.


The breakdown is another reason for such uncharacteristic behavior. If the water is excessively warm (above 25 ° C), some species of fish (for example, goldfish) may be in the bottom layers, which is unusual for them.

They will look for cooler water, which is exactly in the lower compartment of the tank. However, prolonged exposure to cool water can cause hypothermia, loss of strength, with concomitant health effects.

Gradually heat the temperature of the reservoir to normal, then the pets will begin to swim higher.

Has your fish started to swim to the bottom and rub your body against gravel, rocks or sand? This is a clear sign of illness.

Ichthyophthyriosis (semolina), holodonelez, trikhodiniosis – these are parasitic diseases in which fish with scales begin to rub against stones, bottom plants or decorations. Immediately place the fish in a quarantine chalice, and begin to heal them.

And the last reason why the fish is at the bottom and can not rise – it is preparing for death. Before death, she can hide, behaves apathetic and indifferent to what is happening around.

For the old fish is a habitual behavior. In this case, try not to panic, and in time remove the dead fish from the aquarium before decomposition.

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