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Water temperature for cock in aquarium

maintenance, care, compatibility

The cockerel fishes are considered unpretentious and easy to care for; however, some conditions should be met.

Males can be kept in small (10-15 liters), and in large aquariums. On one individual requires 3-4 liters of water. If the aquarium is large, then it can be divided into several parts by partitions.

In this case, several males can be kept in one tank at the same time without damage to their health.

Partitions are made of transparent non-toxic material with small holes for water circulation. Next to them, it is better to plant high plants in order to block fish from viewing and reduce undesirable meetings.

The males are able to jump quite high out of the water, so the top of the aquarium is equipped with a net or cover with holes for the passage of air

The optimum water temperature is 24-28 ° C, however, the rooster is fairly well tolerated to lower it to 18 ° C. It should be remembered that a long stay in a too cold aquarium is fraught with diseases.

The control is carried out by means of a thermometer.

The quality and composition of the water cockerel undemanding. Nevertheless, it is better to adhere to such a framework: hardness 4-15, acidity 6.0-7.5.

For the prevention of disease and stress reduction, it is recommended to use a special salt (half a teaspoon per three liters of water).

A prerequisite is regular water changes. In large aquariums it is held once every two weeks, and in small – once every three days.

From the bottom it is necessary to remove all remnants of food.

The Cockerel Fish: content, compatibility, reproduction, photo-video review

The question of the volume of the aquarium for these fighting fish is a separate topic.

Alas, almost all pet stores sell these luxury fish in 250ml. glasses, while sellers tell people that these are “unique fish”, they say they do not need oxygen, filtration, that they feel great even in a glass.

Do not believe the sellers of pet stores, their task is to sell the goods, and what will happen next with the fish, with you and the tears of the child who saw the cockerel floated up with a belly up – DOESN’T INTEREST THEM. And yet, you would know how many cockerels do not live out of pet stores until the time of purchase.

You would sincerely feel sorry for these innocent fish.

Yes, of course, cockerels are hardy fish, in natural habitat they live in muddy, silted, oxygen-free rice fields. But this does not mean that they can be kept in a small glass with water.

Firstly, because the conditions of keeping of any animal should be as close as possible to the natural living conditions. Monkeys must jump in trees, birds fly, and fish swim.

When the cockerel fish just hangs in a glass, dropping the fins – this is actually a sad sight. Secondly, in the cup, vase and other small vessels there is no biobalance at all.

In the rice field, for example, various biochemical processes take place that purify water from various poisons (ammonia, nitrites and nitrates), these processes are absent in a glass with water, the poisons accumulate, the immunity of the fish weakens and it dies. Biological equilibrium in artificial conditions can be achieved only in spacious aquariums, and the more, the better.

So, the minimum amount of aquarium (decorative vase, etc.) for cockerels should be 3 liters. To call such a vessel an aquarium is difficult in all senses, and therefore, if we talk about creating a full-fledged aquarium, the minimum volume for one individual should be 5-10 liters.

In such an aquarium, you can put a mini-filter, such an aquarium can be beautifully — naturally, you can plant aquarium plants, adjust the biobalance, and taking care of such a reservoir is much easier than washing the “pot” weekly, while delivering great stress to the fish. A good volume for a pair of Bette is considered an aquarium from 20-30l.

About how much you can keep the fish in the X aquarium, see HERE (at the bottom of the article there are links to aquariums of all volumes).

Requirements for the care and maintenance of cockerel fish

From the above, we can conclude that in one, a small aquarium, you can contain only one male cockerel. If the aquarium is large – from 100l. You can try to plant the second male or make transparent partitions in the aquarium, for example from plexiglass, pre-drilled holes in them to circulate the water in the aquarium.

In addition, I advocate the creation of a natural – natural environment in an aquarium. The aquarium can and should be decorated with stones, grottoes, snags, as well as living aquarium plants. Lighting should not be very bright, preferably the presence of filtering.

The aquarium itself should not be filled with water to the brim, you need to leave 7-10 cm and be sure to cover the aquarium. All labyrinth fish and cockerels in particular breathe atmospheric air, swallowing it from the surface of the water.

In the absence of airspace or access to the surface of the water, the fish will suffocate. A lid is needed to ensure that the air swallowed by cockerels from the surface of the water is not too cold.

An aquarium with cockerels can be equipped with artificial plants, but still, if you have the opportunity, purchase live aquarium plants. With live plants, the aquarium looks more natural, the plants themselves contribute to biological balance, and the males can also use them for spawning and creating a foamy nest.

Of unpretentious plants for cockerels can recommend: vallisneria, rogolini, cryptocorynes, other not complex plants.

Feeding and diet of cockerels: they are not whimsical in food, they are happy to eat both dry and live food (Artemia, bloodworm, etc.). The males eat any brand-name dry food, but advanced aquarium brands have developed special ones for them – individual foods that are best suited.

Feeding aquarium fish should be correct: balanced, varied. This fundamental rule is the key to successful keeping of any fish, be it guppies or astronotuses.

Article “How and how much to feed aquarium fish” talks in detail about this, it outlines the basic principles of the diet and feeding regime of fish.

In this article, we note the most important thing – feeding fish should not be monotonous; both dry and live food should be included in the diet. In addition, you need to take into account the gastronomic preferences of a particular fish and, depending on this, include in its diet ration either with the highest protein content or vice versa with vegetable ingredients.

Popular and popular feed for fish, of course, are dry food. For example, hourly and everywhere can be found on the aquarium shelves of food company “Tetra” – the leader of the Russian market, in fact, the range of feeds of this company is striking.

In the “gastronomic arsenal” of Tetra are included as individual feeds for a certain type of fish: for goldfish, for cichlids, for loricarids, guppies, labyrinths, arovan, discus, etc. Also, Tetra has developed specialized foods, for example, for enhancing color, fortified or for feeding fry.

Detailed information on all Tetra feeds, you can find on the official website of the company – here.

It should be noted that when buying any dry food, you should pay attention to the date of its production and shelf life, try not to buy food by weight, and also keep the food in a closed state – this will help avoid the development of pathogenic flora in it.

In nature, live: Southeast Asia: Indonesia, Thailand, Cambodia, Malaysia, Vietnam. They live in stagnant, oxygen-free waters – puddles, ditches, rice fields.

Description: Very beautiful fish, its veil tail and fins just fascinate. The color of the fish is different. The most common ink color with a reddish tint.

Males are colored much brighter, fins are longer than those of females. The size of the fish is 5-10 cm.

Body laterally compressed, elongated, oval. They have cycloid scales, pointed pectoral fins, upper and tail fin of a rounded shape, the lower fin originates from the head and ends at the base of the tail.

The history of cockerel fish

The first mention of the fish dates from the beginning of the nineteenth century, it was then that the people of Siam paid attention to these small, but lively and aggressive fish. Next, the Siamese began to cross wild individuals Betta and got a new kind of fish, calling it “biting fish.”

A couple of copies of these “pieces” in 1840. King of Siam handed over to Dr. Theodor Cantor, who in 1849 gave them the name Macropodus pugnax. After 60 years, the British ichthyologist Charles Tate Regan renamed them “The Beton Fish”, arguing that the Macropodus pugnax species already exists in nature.

It is known that the cockerel fish appeared in Paris in 1892, in Germany in 1896, and in 1910 appeared in the United States with Frank Locke from San Francisco, California. Through the selection of these fish, he received a “new” fish, calling it Betta Cambodia – one of the first color variations of Betta Splendens. The history of the appearance of Bette in Russia is not truly known.

There are several versions. The first is associated with aquarist VM.

Desnitsky, who allegedly in 1896. brought from Singapore exotic species of fish and plants, but it is not known for certain whether there were any cockerels among them. The second version says that the aquarist V.S. Melnikov approximately in the same period spread a number of labyrinth fishes in Russia.

By the way, a competition for the best fighting fish was established in his honor. And the latest version says that the fighting fish were brought in by the Frenchman Seysel, and all descendants from Russia and Europe went from his fish.

Types of Bette and Petushki selection forms

The first thing I want to say is that the cockerel fish (Betta splendens) is one of the Bett species. Bette species should be distinguished from Betta splendens breeding forms.

On the Internet, everywhere breeding forms of a rooster are given for species, which is not correct!

So, the Bette’s species include: Betta picta (Betta picta), Betta striped (Betta taeniata Regan), Betta smaragdova (Betta smaragdina Ladiges), Betta untamulata (Betta unimaculata), Betta black, she’s also the dwarf, Cockerel black, she’s black, she’s black, she’s black, she’s black, she’s black, she’s black imbeIIis ladiges), Cockerel (Betta splendes).






And here, the selection forms of the Cockerel (Betta splendes) include:

In size and shape of the fins:

– Veiltail fighting fishes or “veil cock”

– Deltatail fighting fish

– Giant or royal fighting fish

– Crescent-tailed warrior fish

– Round-tailed fighting fish

– Crescent-tailed warrior fish

– Deltatail fighting fish

– Flagtail fighting fishes

– Poster fighting fish

– Crownstail fighting fish

– Poster fighting fish

– Crosstail fishes

– Two-tailed fighting fish

– other


By color:
Multicolor “multicolor”, two-color, one-color.

Photos of some breeding forms

(Betta splendes)



An aquarium for spawning may not be large from 10 liters, the water level in which should be 10-15 cm. A spawning aquarium should not have soil and is equipped only with shelters for the female, for example, with crown, as well as with small bushes of perististoistnye plants, for example, with roetail.

You also need to use plants that float on the surface of the water: duckweed, pista, vodokras. These plants are used by the male in the construction of the so-called “foam nest”.

The temperature in the spawning tank should be in the range of 26-30 degrees Celsius. Different sources, write different data on the temperature regime for spawning Bette. Taking into account the analysis, I think that 28 degrees is the norm.

This temperature is optimal and makes it possible to increase it by a couple of degrees, thereby stimulating spawning.

Spawning and soft water is used for spawning aquariums. Soft water is an incentive to spawn.

You can soften the water aquarium chemistry – preparations containing peat, and other methods. In addition, in the spawning aquarium is recommended to throw a leaf of almonds (see

Herbal medicine for fish and aquarium).

Before spawning, the producers sit for a couple of weeks, and are abundantly fed with live food. After spawning in the aquarium, the first place the male, which begins to settle.

As soon as he begins to build a foam nest, a female with caviar is brought to him. The presence of calf in the female can be determined by the rounded abdomen.

If the spawning process does not start or the male does not pay attention to the female, the spawning should be stimulated: by softening the water or replacing the water with fresh water, raising the temperature by 2-3 degrees. If after these manipulations, spawning does not begin, you can try to plant another male in the presence of the male (if you have one).

But, usually the above described problems with breeding cockerels do not arise, in the evening the male already finally builds a nest, and in a day the calf already matures in it.

IMPORTANT. Stimulating fish in a spawning aquarium with live food is prohibited.

At the time the producers are in spawning, they are not fed at all in order to avoid contamination and unwanted fungi and bacteria.

The process of spawning itself is very interesting. It begins with the fact that the male swims up to the female, hugs her and squeezes 2-5 eggs out of her.

Eggs begin to fall to the bottom, the male quickly collects them in his mouth and places them in a foam nest. This “hug and spin” process is repeated several times.

A visual indication that the spawning is over is the male’s circling over the foam nest and the female’s seat in the shelter. As soon as this moment has arrived, the female is removed, since in the eyes of the male she begins to carry a threat to the offspring, which is why he can kill her. The deposited female is abundantly fed.

Further, all the care of the clutch and the offspring takes the father! The main thing at this moment is not to disturb him.

After one day, the larvae will appear, and after another day the yolk bladder will resolve in the larvae and they will begin to swim.

You can remove the happy “father” and start feeding the fry with live dust by infusoria or, for example, as some members of our site do it with melted water from Artemia frost. You can also try dry fish “baby food”, for example, Sulfur Micron.

Such feeds are either diluted in a bowl and the resulting suspension is poured into the spawning unit, or they take the feed at the tip of a finger and, grinding it in water, feed the young fish. Food in the aquarium should be present constantly.

When feeding with live food (ciliates), water does not change, and when feeding with dry food, 80% of water is replaced daily in order to avoid contamination and mortality of the young. To maintain cleanliness in the aquarium, you can place snails ampoule or coils.

In the future, young cockerels are gradually (3-4 days) transferred to larger feeds, starting with Artemia nauplii, etc. After about two weeks, you can begin to try to give “adult” feed.

The betta fish or cockerel (lat. Betta splendens) is unpretentious, handsome, but can slaughter the female and other males.

It is a typical labyrinth fish, that is, it can breathe atmospheric oxygen. It was the aquarium cockerel, and even his relative, the macropod, that were among the first aquarium fish that were brought to Europe from Asia.

But long before that moment, the fighting fish were already bred in Thailand and Malaysia.

Fish gained popularity for its luxurious appearance, interesting behavior and ability to live in small aquariums. And he is easily divorced and just as easily crossed, as a result – a lot of color variations, different in everything, from the color to the shape of the fins.

The wild form of the rooster does not shine with beauty – greenish or brown, with an oblong body and short fins. He received the name of the fighting fish for the fact that the males arrange furious fights with each other, which often end with the death of one of the opponents.

Wild form and to this day used in Thailand for fighting, although not already leading up to the complete destruction of one of the fish. Despite the fact that the fish are fierce fighters, they have a peculiar behavior in a fight.

If one of the males rises after the air during the battle, the second one will not touch it, but wait patiently until it returns. Also, if two males fight, the third does not interfere with them, but waits in the wings.


But those cockerels, which you will find on sale, are far from such fighting fish as their relatives. No, their character has not changed, they will also fight. The very concept of this fish has changed, because the current breeds must bear beauty, they have gorgeous fins, so long that they are damaged even by plants, not to mention fighting.

They are kept for beauty, gorgeous colors and equally gorgeous fins, and not for fighting qualities.

With the right neighbors, they are pretty livable. But during spawning, the male is extremely aggressive, and will attack any fish. Especially fish like him (even his female) or brightly colored.

Because of this, they usually keep one for an aquarium, or they pick up fish for him that he cannot offend. A male can be kept with a female, provided that the aquarium is large enough and the female has room to hide.
Attention! The cockerel is just great for beginners and those aquarists who can not afford a large aquarium. He needs the very minimum both in volume and in nutrition.

And he is unpretentious, strong, always on sale. Due to its labyrinth apparatus, it can survive in poor water for oxygen, and in very small aquariums.

If you have been to the market, you probably have seen how these fish are often sold in tiny banks. On the one hand, it speaks about unpretentiousness in maintenance and care, but on the other hand it is a bad example.

On how to choose the right aquarium for the cock you can read the link, there is nothing complicated there. It dwells in all layers of water, but prefers the upper ones.

It is very simple to keep it, for one fish, 15-20 liters will be enough, although this is a minimal amount, it still needs care. You should not keep it in a round aquarium, although it is a popular phenomenon.

It is better to have a rooster in an aquarium of 30 liters, with a heater and always covered, as they can jump out.

If you do not contain one, but other fish, you need an even more spacious aquarium, with shelters for the female, preferably with dimmed light and floating plants. From regular care, it is imperative to change the water, about 25% of the volume per week, since the accumulated decay products will primarily affect the state of the fins.

As for the filter, it does not hurt, but oxygen (aeration) is not needed, it breathes from the surface of the water.

As for water parameters, they can be very different, only temperature is crucial, since it is a tropical species. In general, it is recommended: temperature 24-29C, ph: 6.0-8.0, 5 – 35 dGH.

Rooster aquarium fish – maintenance, care and compatibility with other fish

The cockerel fish, or, as it is also called, fighting, is a representative of the labyrinth family. Such a name in this species is not accidental. The bright color and the warlike character of the “fighters” in some way resemble the same cocky and beautiful “earthly” roosters.

If two males are placed in one aquarium, then a real cockfight with loose tails and fins can begin. It is necessary to quickly separate fighters, otherwise one of them will die.

Fighting cockerels are extremely popular in their homeland.

The cockerel fish is descended from Thailand, Indonesia and Vietnam. There, these aquatic inhabitants live in small warm waters. Therefore, the optimum water temperature for this type is 22-26 degrees.

There is little oxygen in the silted, stagnant waters of Southeast Asia. Therefore, your aquarium does not need an aerator for oxygenation.

At home, no one is particularly interested in the color of the cockerel fish. Their content boils down to preparing for battles. This is done by special trainers.

A lot of spectators come to watch the fights. However, most often the death of the fish is not allowed, rather dangling fins.

Spawning should be carried out in a small separate aquarium (from seven liters). The height of the water column at the same time should be about 10-15 cm. Shelters are made of aquarium plants and artificial grottoes.

The cockerel (female) fish will be able to hide here from the male, which is very aggressive during this period.

Producers before spawning should be fed all sorts of live food. Bright light is not needed.

In the spawning aquarium should not do aeration – it will prevent the construction of the nest.

Sexual maturity in fighting fish occurs in three to four months. Spawning can be stimulated by a large water change.

It is heated in an aquarium at 1-3 degrees. Pre-fish “acquaint” with each other.

To do this, they are placed in adjacent tanks so that they can see their neighbors.

For the male, small floating plants are added so that he can strengthen the nest. At the beginning of spawning, starting to build a “dwelling”, the male cock lets out small air bubbles, then gluing them together with his saliva. About a day after the manufacturer was launched, a future mom would sit down to him.

After the start of spawning, the male cockerel collects eggs from his mouth and carries them to the nest.

At the end of the spawn, he becomes aggressive, attacking the female. Therefore, it should be removed to another aquarium.

The male breeds the offspring – he guards the nest, picks up the fallen eggs, placing them back. After the larvae hatched, the cockerel does not allow them to spread in different directions, collecting them.

A female at a time is capable of sweeping 100-300 eggs. Under normal conditions, spawning begins in a day or two after a pair of males is placed together in an aquarium. It happens, however, that this process is delayed for a week.

After a day or three, the larvae appear in the aquarium. After all the fry appear, and this will happen in 4-6 days, the male is removed, otherwise it is able to transfer the fry spreading in different directions. In a spawning aquarium, the rooster is usually fed with bloodworms.

Feed must be rinsed beforehand.

In males fry, a labyrinth organ will appear only in a few months. To create good conditions for the young, it is necessary to establish aeration.

You can lower the water level.

The fry are fed with infusoria – “living dust”. In exceptional cases, you can give a steep egg yolk.

However, it is not worth to abuse such lure. When the young growth grows up, it is possible to transfer it to feeding by the Artemia larvae.

Next, the size of the feed is selected based on the size of the fry. You can enter shredder into the diet or specially developed industrial feed.

They live fighting fish for about three years. In the “old” age it is undesirable to use them as producers.

You do not need to have academic knowledge or special conditions in order to have a rooster fish. This species feels great even in a small-sized aquarium.

Some owners manage to keep one individual in the usual three-liter jar. But the two males in one “pond” do not get along.

True, some owners share long aquariums with glass, settling their pets one by one in different compartments. Many do this also because, seeing the opponent, the males begin to become brighter, more colorful, they take up belligerent poses, trying to frighten and intimidate their counterpart.

Females are not so aggressive, they can be kept on several individuals simultaneously.

The cockerel fish at home can live in the aquarium at the same time as other species. It is worth, however, to avoid the neighbors with veil fins.

Otherwise, the “fighters” will certainly cut them off. It is better to settle to the cockerels of larger fish with short fins, for example, barbs.

For tropical cockerels, it is desirable to maintain the water temperature in the range from 24 to 28 degrees. It is allowed to periodically reduce it to 18 degrees.

Open areas should be left on the surface of the water, without floating vegetation. Fish need air.

Special aeration of water is not needed, but it is desirable to pass water through the filter. It is recommended to set up an aquarium so that during the day the sun falls on it for several hours.

It is undesirable to put it in a draft.

Periodically thoroughly clean the reservoir. To do this, either partially or completely change the water.

The fish are pre-caught with a special net and placed in a jar. Sanitation is carried out without the use of powders.

Labyrinth organ – a distinctive feature of cockerel fish. This is not a simple addition to the gills – these babies breathe atmospheric air.

Make sure that the surface of the water does not overgrow. Sometimes a bacterial film appears on it, it is easily removed if you attach a sheet of paper to the water, and then simply remove it carefully.

Males can jump out hard. So that they do not harm themselves, install a special cover with holes or a grid.

For fish need soft water. Do not use distillate for the aquarium, as it contains not only harmful, but also useful substances.

In specialized stores sell special products to soften and purify water. Temperature should be monitored. To reduce aggressiveness and stress a little, add a little therapeutic salt (half a teaspoon per four liters).

Large aquariums need to be replaced every two weeks. In the interim, it is necessary to change it partially. Small aquariums need to be cleaned and replaced twice a week.

Be sure to remove the remaining feed from the bottom – the products of its decomposition will poison the water.

As mentioned earlier, male cockerels can not be kept together. It is also undesirable to keep together heterosexuals.

The male will constantly chase and bully the female.

Do you have a cockerel for the first time at your home? “With whom does this species get on?” – such a question is often asked by beginners. Despite the “martial” glory, cockerels behave quite peacefully towards their neighbors.

Sometimes, however, the male can attack the male guppy, taking him for a relative.

It is undesirable to share a rooster with owners of beautiful long fins and tails. This is sure to provoke a fighting fish, and it will begin to attack.

It is unlikely that the cock will bring the opponent to death, but he can bite or tear off the tails and fins.

Often, owners of aquariums are hooked to their pets snails. Fight fish can eat small specimens (for this they are usually planted).

In larger individuals, cockerels may bite off the antennae. It should be remembered by those who are planning to decorate your aquarium with large snails.

Your cockerel will live longer if initially purchased from a good seller. When you notice that the fish lives in quality conditions, moves well, eats, it has a beautiful appearance – it means that you can settle at home.

First of all, pay attention to the activity of the fish in the aquarium, the state of the scales and fins, its general physical condition.

Buy a young fish. The sooner she gets used to your tank, the more comfortable she will be there. The youngsters adapt more quickly to new conditions of life.

In young males, the fins are shorter than in the mature ones, and in the young the body size is several centimeters smaller.

Look at the young male Blue / Red Dragon Halfmoon Betta.

Estimate the volume and condition of the water in which the not yet purchased fish lives. If you notice a cloud, dirt, substrate of unknown origin, wait a little with the purchase.

Water should be clean, clear, slightly yellowish shade is allowed.

Look at the other fish that live in the same tank with the fish you like. Is it a little tight day?

How do they move, feed, their external condition? The Siamese cockerels are fighters, and a long settlement in a species aquarium will destroy them all.

If each fish lives separately, in good conditions – this is a big plus.

Do not buy two Betta splendens at once. If you lodge newcomers in a common tank, they quickly harm each other. Buy one pet, put him in a 2-week quarantine, look at his condition.

When he gets used to the new environment, you can populate it in a pre-prepared aquarium. After a few months, you can add neighbors to it, but given the nature of the character, this is a big risk.


  1. Set up the aquarium correctly, wait until it is established biological balance. Let it be a rectangular tank with a volume of 50-100 liters. Small, round containers will not allow the fish to move, it will be uncomfortable and boring. In the spacious reservoir there is an opportunity to create an amazing aquascape that resembles a natural biotope. Use a good filter to quickly deal with biological stress.
  2. Let plants and algae be in your tank. In the most convenient for cockerels tanks there is a lot of vegetation, they are provided to ensure that there is enough oxygen in the water, and it remains clean. Buy plants from trusted vendors so that they are healthy and treated for parasites.
  3. Maintain the temperature in the aquarium. Adjust it with a water thermometer. The cockerel is a tropical fish, which is used to warm water: the temperature is 26-29 ° C. Use 50W heaters.

See how to keep a cockerel fish.

  • The life of the fish will extend the correct, balanced feeding. In the aquarium, the fish will only eat what they give it, so choose several types of feed. Live, frozen, dry, artificial – the cockerel is omnivorous. However, do not overfeed, try to give suitable, proven feed. Clean uneaten food residues in time.
  • Be attentive to your pet – watch him, play with him. Teach him new tricks to help him interact with you.

  • Do not try to provoke the fish to aggression. Sometimes you can put a mirror in the aquarium, but for a short time. Betta’s cockerel is a real fighter, so he should not be in constant rage. Do not put decorations or stones on the bottom of the tank that could damage the quality of the water. Dyes, water softeners are not always appropriate.
  • Make timely water changes and clean your aquarium. There is a perception that cockerels are very hardy fish, but this is not entirely true. Dirty water provokes illness, and even the death of a pet. Sharp changes in water parameters are also destructive for a living being.
  • Let the fish spawn. Let the roosters not have good parents, but the lack of reproduction adversely affects their health. In the female, the calf lag forms cysts with which it is difficult for her to live. Males become more lethargic and live less.

  • Make sure the lid in the aquarium is slightly open. Like labyrinth fish, cockerels must breathe more and atmospheric air. Ensure that the air and water temperatures match.
  • Water temperature in a fish tank – Frequently asked questions by aquarists

    Have you ever thought about why different fish need different temperatures? And how does the discrepancy affect them?

    And how sensitive are they to drops? Rapid changes in temperature aquarium fish suffer poorly, this is one of the reasons from which newly acquired fish die.

    In order for fish to get used, they need to be acclimatized.

    Simply put, the higher the temperature of the water, the faster the fish grow, but they also age faster. We collected a few frequent questions about the temperature for aquarium fish and tried to answer them in an accessible form.

    Does this mean that the temperature of the water directly affects the fish?

    Water temperature affects the speed of physiological processes in the body of fish. For example, in winter, the fish of our water bodies is inactive, since the level of metabolism drops significantly in cold water.

    At high temperatures, water retains less dissolved oxygen, and for fish it is very important. That is why in the summer we often see fish rise to the surface and breathe heavily.

    Rapid changes in temperature aquarium fish suffer poorly, this is one of the reasons from which newly acquired fish die. In order for fish to get used, they need to be acclimatized.
    Simply put, the higher the temperature of the water, the faster the fish grow, but they also age faster.

    How sensitive are fish to temperature extremes?

    Fish feel the slightest change in water temperature, some even such as 0.03C. Aquarium fish are usually all tropical species, and, therefore, are accustomed to live in warm water with a constant temperature.

    With a dramatic change, if they do not die, they will survive significant stress and become infected with an infectious disease, due to a weakened immunity.

    Fish that live in a climate like ours are much more stable. All carp, for example, tolerate different temperatures well.

    What can I say, even the well-known goldfish, can live both at a temperature of 5C and at more than 30C, although such temperatures are critical for them.

    Yes, several species can temporarily live in hot water. For example, some Killifish species that live in Death Valley can carry up to 45 C, and some tilapias swim in hot keys with a temperature of around 70 C.

    But they all can not live long in such water, the protein in their blood just begins to collapse.

    But the fish are able to live in ice water, more. At both poles there are fish that produce a kind of antifreeze in their blood, allowing them to live in water with a temperature below zero.

    As already mentioned, warm water retains less oxygen, and the fish begin to experience oxygen starvation. They begin to choke, and the first thing to do is turn on a powerful aeration or filtration to increase the movement of water and metabolic processes in it.

    Next, you need to put in the aquarium a bottle of cold water (or ice, if you were preparing for this situation), or replace some of the water with fresh water with a lower temperature.

    Well, the simplest and most expensive solution – air conditioning in the room. And in more detail about all this read in the material – hot summer, lower the temperature.
    And the simplest and most inexpensive is to install 1-2 coolers so that they direct the air flow to the surface of the water. This is a proven cheap way to cool the temperature in an aquarium by 2-5 degrees.

    And what tropical fish can you keep in cold water?

    Do I need to change the water in the aquarium with water of the same temperature?

    Yes, it is desirable that she was as close as possible. But at the same time, in many species of tropical fish, the addition of fresh water with a lower temperature is associated with the rainy season and the beginning of spawning.

    If you breed fish in your tasks is not included, it is better not to risk and equalize the parameters.

    For sea fish, it is definitely necessary to equalize the temperature of the water, since sea water does not have sharp changes.

    You can read more about acclimatization by clicking on the link. But, in short, the fish actually needs a lot of time to get used to the new conditions.

    Only water temperature is critical when landing in a new aquarium, and it is desirable to equalize it as much as possible.

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