For aquarium

Temperature for aquarium fish


The optimal temperature for fish in the aquarium

The expression "feel like a fish in water" is familiar to all. And it means comfort in certain conditions. But the inhabitants of the reservoirs may also experience inconvenience in their biome if their living conditions are disturbed.

Fish in the aquarium

In natural waters, fish are more accustomed to temperature changes, since this is their natural habitat. Yes, and the area of ​​water space is such that warming or cooling water occurs gradually. So the fish here have time to adapt.

With aquariums, the situation is somewhat different: the smaller the volume, the more tangible the temperature jumps. And the more likely the development of "fish" diseases. Novice aquarists should consider this feature and know what the normal water temperature in the aquarium is.

In one aquarium, it is desirable to keep the fish, accustomed to certain conditions of life, with the same features of the body. Despite the fact that all the fish - cold-storage, some of them live in cold waters, others - in the warm.

  • Fishes accustomed to warm waters can be divided into 2 species: consuming a small amount of O2 and those who need large reserves of oxygen.
  • A cold-water type of fish is only called that - they calmly withstand different temperatures, but they require a large amount of oxygen in the water.

For beginners aquarists can recommend small aquariums with low-breathing warm-water fish. In large tanks, it is better to initially contain the cold-water inhabitants of aquariums.

What should be the temperature of the water in the home aquarium

To the inhabitants of domestic ponds was comfortable, the temperature there must be at a certain level. And before you run the fish in your aquarium, you need to know what the natural conditions of its existence are (and most of the aquarium inhabitants come from the tropics).

The gradation of temperature parameters can be represented as follows:

  • The optimum temperature of the aquarium, which is suitable for most fish, ranges from 220 to 260C;
  • water temperature in the aquarium below the minimum optimum is no longer acceptable to warm-water fish;
  • a rise in temperature above 260 is permitted by 2-40 ° C if it is gradual.

Changes in temperature in a domestic pond to one side or the other from the optimal parameters are more easily tolerated by aquarium inhabitants if the water is sufficiently enriched with oxygen. The most difficult thing will be to fed fish - they need more air at any temperature drop. But with a sharp cooling, the fish will suffer and hungry.

What to do when the temperature drops

The reason for lowering the temperature of the water can become a banal room ventilation. The owner of the aquarium may not even immediately notice that the fish became ill. To raise the temperature to standard indicators, you need to go for some tricks.

  • If there is a heat heater, you are lucky - connect it and warm up the water to the desired parameters.
  • You can pour into the pond a little boiled water (no more than 10% of the total). But this should be done gradually, adding heat no more than 20 for every 20 minutes.
  • The previous method requires caution so that hot water does not get on any fish. The best option would be a plastic bottle filled with boiling water - it quietly drifts over the surface, giving off heat to the aquarium water.
  • If the fish are very bad, “water” their cognac (or vodka) - 1 tbsp is enough for 100 liters of water. of alcohol. It will a little cheer up the inhabitants of the aquarium, but the tank will soon have to be washed.

How to lower the temperature in the pond

A failed thermal sensor on a heating pad or close proximity to the heating system can provoke a sharp increase in temperature in the aquarium. Even the sun's rays in the summer will quickly warm the home water reservoir, if it is located on the southern windowsill. Try to keep the water parameters below 300 ° C, otherwise the aquarium will turn into a kind of pot with an ear.

  • To save the fish can the same bottle of plastic, but already filled with cold water or ice. Lower the temperature smoothly.
  • Keep the compressor turned on until the temperature can be reduced to normal. Reinforced aeration will allow fish to breathe "full of gills."
  • 1 st.l. will help to enrich water with oxygen. hydrogen peroxide (per 100-liter container). This pharmacy drug in parallel and hold disinfection in the pond, destroying the parasites.

It should be borne in mind that a rise in temperature is more contraindicated for aquarium fish than for its decrease. Here, even the poor health of aquatic inhabitants can be affected by the presence of various nitrates in the composition of the water, which are especially harmful at elevated temperatures.

The temperature regime must be monitored.

Experienced aquarists have long protected themselves from such troubles as the need to lower or raise degrees. To keep fish at optimum temperature limits, the following rules should be taken as a basis.

  • Choose the "right" place for the aquarium: away from heating appliances, air conditioners, away from direct sunlight (especially in summer) and drafts.
  • Thermowheel should be of high quality and reliable sensor.
  • A thermometer is an indispensable device for completing any aquarium. The location of its location, select such that it was convenient to monitor the indicators of the scale.
  • Aeration is not a whim, so the compressor should turn on regularly. What habitat without enough air will be comfortable?

How to lower the temperature of the water in the aquarium:

Aquarium water temperature

All life on our planet can exist only in the optimal temperature range. This fully applies to ornamental fish. What temperature should be maintained in the water house? How to create comfortable conditions for different types of fish? On these and other issues you need to think before starting the breeding of aquarium living creatures.

Temperature and health of fish

The development, livelihoods and health of the inhabitants of the water element is directly dependent on the state of the water. And ornamental fish is no exception. The fact is that the chemical and biological processes of their body are closely related to the temperature regime.

For example, heating water just 8-10 degrees above normal causes the fish to increase oxygen consumption. And in an excessively warm aqueous medium, the solubility of oxygen molecules decreases.

This factor in some cases can even lead to the death of the inhabitants of the aquarium. In such situations, they say that the fish suffocated.

Undesirable and sudden changes in temperature, which are possible if the house for aquatic animals is installed incorrectly: at the window on the sunny side, for example.

Optimum temperature

Most often, people keep fish in their home aquariums, whose homeland is tropical latitudes. The water temperature in this climate is practically unchanged and is 20-26 degrees above zero. Approximately the same amount should be maintained in the aquarium for the owners of decorative domestic fish. True, for different species there may be some variations of the regime.

Goldfish, for example, like cool water, not lower than +18 and not higher than +23 degrees. Even a slight increase in temperature can lead to the development of diseases in these cold-blooded beauties.

Holders of such rare species as labyrinth fishes or beautiful discus, know that they need to maintain a higher temperature of water - about 30 degrees Celsius. This is one of the reasons why these fish are not recommended for breeding novice aquarists.

All other types of decorative floating creatures are quite satisfied with water with a constant temperature of +22 to +25 degrees. By the way, the same mode is considered optimal for aquatic flora, as well as for crayfish and shrimp.

So, the normal climate for life must be constantly maintained. This is achieved using special aquarium equipment.

Water heater for aquarium

If the aquarium is deep enough, then the water in its lower part is somewhat colder than the surface. It is believed that the temperature difference should not be more than 2 degrees, and ideally the aqueous medium should be homogeneous.

That is why, when heating water, the so-called rod heater is most often used. This simple device constructively is a hollow glass (or ceramic) core, inside which is placed a heating element - nichrome wire.

With the help of suction cups, the aquarium heater is mounted vertically to the tank wall. Most models have an automatic heating control function.

Such devices on the market are very widely represented. Here you can select the heater aquarium company Polish Aquael or Chinese product brand XILong. Products of these manufacturers are available with or without thermostat (budget option).

Aquarium Cooler

Often it is required to provide cooling water in the aquarium. Such a need may arise at high air temperatures in the room. For these purposes, special devices have been created - aquarium coolers. They are of two main types: air and water.

Air cooler at its core is a compact fan with a thermal sensor. It is attached to the top of the rear window and chases the cool air above the surface of the aqua, increasing the rate of evaporation of warm water.

After cooling the water, the fan stops at the command of the thermal sensor. Low power consumption, low noise level during operation contribute to the widespread use of such coolers in small and shallow aquariums.

As an example: high reliability and low power consumption distinguish portable cooling fans series JBL Cooler German production. They are all equipped with a thermostat to adjust the running time.

For large home or office aquaria use, as a rule, external coolers. They are also called aquarium refrigerators. By design, they really are compact refrigeration units, very effectively cooling the aquarium water that is driven through its system.

Devices mounted near the tank, equipped with two tubes, which are lowered into the tank. One tube serves to collect warm water, and the second - to release the cooled.

On the aquarium market, such devices are represented by the products of the Italian company Teco, the Chinese series of aqua-coolers HAILEA and Resun.

Forced adjustment of the aquarium water temperature is a must. The choice of suitable heaters and coolers depends on the size of the aquarium, the air temperature in the room and, of course, on the aquarist’s budget.

Video on how to organize the cooling of the aquarium with your own hands:

Aquarium water temperature

For all living creatures, including fish, the most important condition for existence is the ambient temperature. It affects not only the environment, but also the chemical and biological processes that take place in animals and plants.

As for aquariums, there should be about the same temperature in all layers, otherwise both plants and fish can suffer. Since the top layer of water is always higher than the bottom, therefore, the temperature should be measured not only on the surface of the water, but also on the ground. The regulator of the temperature of the water in the aquarium can be purchased at the store, and you can make it yourself, but you cannot do without it when breeding fish. Because some temperature changes for many fish species can be deadly.

The optimal temperature in the aquarium

There are no specific numbers to suit each aquarium, as the temperature depends on factors such as its inhabitants, plants, and the chosen maintenance mode. The temperature range for most fish is from 20 to 30 ° C, however, for each individual species of fish should maintain an optimal temperature.

So the best constant temperature range in an aquarium for guppies varies between 24-26 ° C, but some deviations are allowed - 23-28 ° C. At the same time, if the temperature drops below 14 ° C or rises above 33 ° C, then the fish will not survive.

For catfish, the temperature in the aquarium is optimal in the range from 18 to 28 ° C. However, catfish - unpretentious fish, so easily withstand significant deviations from these limits, but for a short time.

The temperature in the aquarium for scalar basically has a large range. The optimum is 22-26 ° С, but they will easily transfer the temperature drop to 18 ° С, but it is necessary to lower gradually, without sharp drops.

The optimum temperature in the aquarium for swordtails is 24-26 ° C, but since these fish are not demanding enough, they will calmly endure a temporary decrease to 16 ° C.

The recommended temperature in the aquarium for cichlids should be in the range of 25-27 ° C. Sometimes it can be increased by 1-2 degrees, but no more, since for most fish of this species the temperature of 29 ° C is fatal. At the same time, a significant decrease in temperature even up to 14 ° С can be transferred by fish quite calmly (of course, not very long time).

How to maintain the temperature in the aquarium?

The water temperature in the aquarium should be constant. Its fluctuations during the day are allowed within 2-4 ° С. Sharper drops can have a devastating effect on the inhabitants of the aquarium.

Everyone knows that the temperature of the water in the aquarium corresponds to the temperature in the room. Therefore, when for some reason it becomes excessively hot or cold in the room, certain measures should be taken.

In the hot season you will need knowledge of how to lower the temperature in the aquarium. There are several ways to do this:

  • use of a special refrigerator for the aquarium;
  • installation of air conditioning in the room, which will maintain a certain temperature;
  • use of ice or cold accumulators.

In the case when it is too cold in your apartment during the cold season, you should know how to raise the temperature in the aquarium. The simplest version of the heater is a hot water heater. It must be placed between the heater and the side wall of the aquarium. But this is an emergency way of heating water, as it will not work for a long time to maintain the temperature of the water.

Each of the ways to increase or decrease the temperature of the water is good in its own way, and you should choose a particular one based on your specific needs.

Aquarium fish catfish Ancistrus - care and maintenance

The aquarium in the house gives joy and pleasure. Many people like to watch the variegated flocks of fish in the aquarium. There are different types of fish that can live at home. One of the most common types of Aztec is an ordinary.

Description of Ancistrus

The homeland of this familiar to all aquarium fish - the river of South America. It is also found in the tributaries of the Amazon. In our country was introduced in the 70s of the twentieth century. Habitat - mountain rivers and streams, can live in swamps and lakes.

The elongated shape of the body makes it possible Antsistrus move along the bottom of the aquarium pretty quickly. On the wide and big head there is a mouth with wide lips and suckers. Horn-shaped suckers on the lips give the fish the opportunity to hold on to the walls of the aquarium, as well as cling to stones and snags. On the face of the male there are still leathery processes. There is a flag-shaped fin on the back, and there is a small fatty fin. Ancistrus ordinary may have a yellow-gray or black color, his whole body is covered with light-colored dots. Aquarists who are engaged in breeding fish, not so often use the name Ancistrus ordinary. Usually they call her catfish sticking.

Maintenance and care

Care for this aquarium fish is not very difficult, because this catfish can live in different conditions. But the water in the aquarium should be fresh, the volume of the aquarium is desirable not less than fifty liters. It must contain stones, caves and snags, in which the catfish will hide.

The comfortable existence of this fish depends largely on the surrounding temperature. A temperature in the range of 15 to 30 degrees Celsius is acceptable, but the best option is 22-25 degrees. Antsistrus ordinary withstands temperature changes. But it is advisable not to bring the case to a strong cooling or overheating. At the same time it is impossible to allow strong turbidity of water. Therefore, it must be regularly changed. But water replacement should be done gradually so that your catfish will not feel a sharp contrast. Boil water for the aquarium is not necessary, just enough to ensure that the water from the tap is settled for three days.

In order for the fish not to choke, you need to periodically aerate the aquarium with a special device. They usually do not like bright lighting and hiding in the algae. Therefore, it is difficult to make a photo of ancistrus. These fish are peace-loving and get along peacefully in an aquarium with other fish, such as guppies and scalars.


This catfish usually feeds on the bloom that forms on the glasses of the aquarium and on its bottom. But you need to feed and extra. The most commonly used dry food, which is sold in specialty stores and markets.

You can give worms (bloodworms), but you need to make sure that the fish do not choke on food. Перед тем, как бросать мотыль в аквариум, его надо помыть. К тому же давать его надо только свежим, поскольку несвежая продукция принесет рыбам вред.

Поедая налет на стенках аквариума, они хорошо чистят его. Если в питании недостаточно зелени, то сом может прогрызать дырочки в листах водоросли, и тем самым портить растения. To avoid such a situation, catfish should regularly receive pieces of cabbage leaves or nettles. Preferably, these leaves before giving the fish, scald in boiling water, then divided into small pieces, tied to a small sinker, and lowered to the bottom. But now the shops sell a lot of different branded feed that contains all the necessary substances, and in this situation, the catfish in your tank will always be fed.


So, the content of antsitrus is not a very complicated matter. If a catfish appeared in your tank and it got accustomed there, then you can think about breeding it.

The female has fry in her belly, and you will immediately notice it. Such fish usually have a swollen belly. If the fry are bred in the general aquarium, then the chances of survival are small. Therefore, you need to deposit a pregnant female in a separate aquarium or in a jar. This process is best done with a special net. These are sold in pet stores. In extreme cases, the net can be made independently, from wire and gauze. These fish are sensitive and cannot be taken into their hands. Photos of such banks can be found in old magazines. In her pregnant catfish will feel comfortable. To speed up the spawning process, you can add some cold water to the jar. When the female begins to spawn, it must be fed with vegetable food. A large number of fry will appear in the bank. If spawning occurs in an aquarium, a photo of which shows in detail all the features of this, then the antcrus male will build a nest for fry.

Spawning usually occurs at night, the female can sweep 40 to 200 eggs. Eggs fall into a previously prepared nest, a photo of which you can make out of curiosity. After that, the female is deposited in another aquarium, and the male is left. The male is stalking eggs. The water in the aquarium in which the eggs live should be warmer than in a normal aquarium. Caviar develops over a period of about a week, and during all this time the male is guarding it quite hard.

Fry catfish feed on dry food. Feed them preferably at least three times a day, every day you need to change at least twenty percent of the water. Fry at the age of six months are already the size of their parents.

Beneficial features

These aquarium fish can greatly help you save on cleaning aquariums. The fact is that this catfish cleans everything around it, and two such fish can quickly clean the walls of even the largest aquarium. They even clear hard to reach places. Also usually eat food that is not eaten by other fish. Most often, these fish graze at the bottom of the aquarium, while guppies and other fish swim near the surface.

Popular aquarium fish


Speaking about the popularity of fish, it should be said that a meaning is embedded in this concept: the prevalence among aquarists, accessibility, ease of maintenance — the simplicity of the fish, etc. That is, a popular fish is a fish deserved authority and demand in the aquarium market. Popularity does not depend on the size or type of fish. As a rule, this question is asked by novice aquarists who are going to purchase or purchase additional fish.

In this connection, it should be noted that when buying fish, first of all, it is necessary to take into account the compatibility of aquarium fish, and only then their popularity.
So, we present to your attention our selection of the most popular aquarium fish (in alphabetical order, with photos and descriptions).
The most popular soma suckers. Antsistrusy not whimsical in the content, are orderlies of the aquarium world. They have a sharp character and can even drive medium-sized, neighboring fish.
Order, family: carps, mail catfish.
Comfortable water temperature: 22-24 ° C.
Ph: 6,5-7,5.
Aggressiveness: not aggressive 10%.
Antsistrus has a mouth with horn-shaped suckers, which he actively scrapes algae in an aquarium - he cleans the walls of the aquarium and eats dead organics. I am happy to eat any live and dry food. The activity of these catfishes is manifested with the onset of twilight or when the aquarium lighting is turned off during the day.
These fish are hard to call easy to maintain, since they belong to the family of tsikhlovyh fish, moreover they are large, predatory fish. Nevertheless, due to its beauty, its qualities: demeanor, mind - the astronotuses won the leading positions in popularity among cichlids.
Order, family: cichlids
Comfortable water temperature: 22-28 ° C
Ph: 6,0-7,5.
Aggressiveness: 99% aggressive
Aquarium volume for astronotus should be from 300 to 500 liters.
Needs aeration, filtration, regular water changes (weekly 30%). Particular attention should be paid to filtering - it should be powerful (the second filter will not be superfluous). The aquarium can be decorated with large stones and snags, the decor should not be sharp. Provide shelters for fish.
Amazingly diverse family of fish. Nimble, gregarious fish, for which it is interesting to watch. Barbs live relatively peacefully with similar medium-sized neighbors in an aquarium, but can pinch smaller and weaker fish.
Order, family: Carp.
Comfortable water temperature: 21-23 ° C.
Ph: 6.5-7.5.
Aggressiveness: quite aggressive 30%.
Sumatran barb compatibility: barbus, gourami, moths, parrot, catfish, creeps, tetri.
Most species of these fish can be kept in aquariums from 50 liters. Lifetime in the aquarium for them is usually 3-4 years. When keeping barbs you need to take into account the peculiarities of a particular species, since the variety of different variants of this fish often confuses novice aquarists.
Everyone knows these fish, even those people who never had an aquarium. This is not surprising because they were the most popular inhabitants of all Soviet aquariums. Guppi fish have also earned their popularity: unpretentiousness in nutrition and maintenance, resistance to adverse conditions of detention and low price.
Poecilia reticulata or Lebistes reticulata
Order, family: Pecilia (Poeciliidae).
Comfortable water temperature: 20 - 26 ° C.
Ph: 6,5 - 8,5.
Aggressiveness: not aggressive 0%.
Guppy Compatibility: compatible with all non-predatory and not big fish.
During the long years of keeping guppies in aquariums and careful selection, many species of guppies have been obtained, and their maintenance and maintenance are not so simple. At present, it is very difficult to classify guppies, because as a result of numerous crosses, more and more new breeds are bred each year.
Gupeshek can be kept in the general aquarium (but not with fast-floating species that can tear off their fins) with a length of 60 cm, in places with dense thickets of plants, including small-leaved, reaching the surface of the water (among them desirable Indian limnophila and glossy grass), floating plants with roots hanging down, as well as riccia, where the fry will find shelter. To the volume of the aquarium guppies are undemanding.

Another large family is the labyrinth fish. The beauty and popularity of these fish is their diversity and beauty. And also in the fact that they are not demanding aeration of the aquarium and can go without it for a long time. This is due to the fact that the homeland - the habitat of the gourami is the rice fields of Asia, where there is little oxygen in the water, and the water itself is stagnant. These fish, as a result of evolution, have learned to breathe atmospheric air, which they capture from the surface of the water with the help of the gill labyrinth.
Order, family: labyrinth
Comfortable water temperature: 24 - 28 ° C.
Ph: 6,5-7,5.
Aggressiveness: not aggressive 40%.
For maintenance, an illuminated aquarium (overhead lighting) with a volume of 100 l and more, with thickets of living plants and free swimming space is required. It is desirable to have snags (fish constantly keep near them). Filtration, light aeration and weekly substitution of up to 30% of the volume of water are needed.
These are small, nimble fishes, which mainly swim in flocks near the surface of the water. Pink danios are especially popular. Unpretentious in content, inexpensive, can get along even with large non-predatory neighbors. An interesting fact about danios is the fact that these are the first fish that have undergone the current trend. Glofish - artificially derived form of glowing fish.
Danio pink Brachydanio albolineatus
Order, family: Carp.
Comfortable water temperature: 21-25 ° C
Ph: 6.5-7.5, water hardness: 5-15 °.
Aggressiveness: not aggressive. Fish are kept in an aquarium by a flock (from 6 specimens) in an aquarium with a length of 60 cm and a volume of 20 liters and more.
Discus are the kings of the aquarium. These fish can not be called easy to maintain, unpretentious. Moreover, their cost very much bites, and their character is so capricious that sometimes even an experienced aquarist has a hard time coping with them. Nevertheless, the disc-shaped body of these South American cichlids, their coloring is just fascinating. This fish is popular because everyone wants to start it in its aquarium, but not everybody can feel it.
Discus blue Symphysodon aequifasciata haraldi
Order, family: South American cichlid.
Comfortable water temperature: 25-30 C.
Ph: 5,8-7,5.
Aggressiveness: not aggressive 10%.
Discus is a big fish. In the natural environment, it reaches a length of 20 cm, in aquariums the size does not exceed 12 cm. The shape of the body is discoid. The dorsal and anal fins are very long, bending around almost the whole body. Pelvic fins narrow. The body is brown with vertical blue stripes. The whole body is decorated with numerous blue strokes. Males are larger and brighter than females, males fins are more pointed.
Discus demanding care - for their maintenance, a tall and spacious aquarium is needed. The minimum size of an aquarium for a couple is 150 liters. However, schooling fish and for its maintenance (5-6 individuals) an aquarium is needed from 300 to 500 liters.
Here we are with you and got to these posh representatives of the aquarium world. Perhaps, these fish are not only known, but also seen by everyone. After all, even with mother's milk, we all heard the fairy tale: “On the Fisherman and the Fish,” where this popular fish, or more precisely, the tail feather, became the prototype of the sea mistress. In addition, since time immemorial, namely from the time of ancient China, the monks were engaged in the selection of these fish, while receiving amazing forms from the progenitor of all Goldfish - silver carp.
Order, family: carp.
Comfortable water temperature: 18-23 ° C.
Ph: 5-20.
Aggressiveness: 5% are not aggressive, but they can bite each other.
Compatibility: with all peaceful and non aggressive fish.
Many novice aquarists, trying to make friends with these fish, take a whole horde of young cinchons. However, you should always remember that this is a large type of fish and for a couple of Goldfish you need an aquarium from 100l.
This is a family of chain catfish. Popular, easy-to-keep, not capricious, peaceful catfish. They have intestinal respiration, i.e. can breathe booty - anus.
Corydoras paleatus
Order, family: armored soma.
Comfortable water temperature: 24-25 ° C.
Ph: 6,0-7,0.
Aggressiveness: not aggressive.
Compatibility: any fish. Only not desirable - Labo, modest bots, well, Ancistrus, because they chase them (although this is more like a game). Large cichlids are also not the best neighbors. The most famous catfish and excellent attendants of the aquarium - by keeping them with "Goldfish" you will ensure the purity of the soil in the aquarium.
Another of the members of the labyrinth fish family. In this topic, it is singled out separately, since lalyusy have a calm and peaceful disposition. Unlike gourami, they peacefully coexist with the most innocent fish.
Order, family: labyrinth
Comfortable water temperature: 18-20 ° C.
Ph: 6,5-7,0.
Aggressiveness: not aggressive 10%.
Lyalius is one of the most beautiful, attractive fish of the labyrinth family. The fish is not big in the aquarium can reach 5-6cm. The body of the fish is flat. The lilius color is greenish-blue with transverse stripes of red and blue-blue color, the belly near the gills is blue. The fins of lalius are covered with red spots. The male lyalius differs from the female in a brighter color. They are the same size. Lyalius live only for a short period of 2-3 years.
Fish has a timid character. It is advisable to put lyalius in the aquarium with calm, peaceful fish. It is recommended to keep cutting with a flock of 3pcs., So the fish feel more confident.
Bright, lively representatives of viviparous fishes. Hardy, active, cheap in price. May contain peaceful cichlids, for example, scalar.
Xiphophorus helleri
Order, family: petsilievye.
Water temperature: 20 - 25 ° C.
Ph: 7,0 - 7,5.
dH: 5-20°.
Aggressiveness: not aggressive 10%.
These fish have a variety of shapes, types and colors. They have a specific tail tail that is unique to them, for which they are among the people that got their name. In addition, swordtails belong to the species of viviparous fish and therefore their breeding does not pose any difficulty.
The combination of the above factors affected not only the popularity of these fish, but it can be said to have made them popular.
Neons are one of the smallest aquarium fish, look beautiful in a flock. Absolutely peaceful, harmless fish, which can talk for hours.
Order, family: carp-shaped, haracin
Comfortable water temperature: 18-24 ° C
"Acidity" Ph: 5,5 - 8°.
Stiffness dH: 5-20° .
Aggressiveness: not aggressive 0%.
The complexity of the content: easy
Neon Compatibility: non-aggressive, peaceful fish (neons, tetras, swordtails, petsyli, ornatus, pulchera, lanterns).
Not compatible: Neon can not be kept with large, aggressive fish: tsikhly, barbs, large catfish, goldfish, Labe, gourami.
Petushki or Betta
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. Fish size up to 7 cm.
Order, family: labyrinth
Comfortable water temperature: 22-24 ° C.
Ph: 6,0-7,5.
Aggressiveness: aggressive males in relation to each other.
Compatibility: with all the peaceful fish. It is not necessary to plant to the swordtails, barbs, gourami, especially to tsikhlam.
Angelfish are popular American cichlids. They favor peaceful and not very large neighbors. Angelfish do not uproot aquarium plants, as many cichlids do.
Latin name: Pterophyllum scalare.
Order, family: Perciformes (Perciformes), cichlids, cichlids (Cichlidae).
Comfortable water temperature: 22-27 ° C.
"Acidity" Ph: 6-7,5.
Stiffness dH: to 10 .
Aggressiveness: not aggressive 30%.
The complexity of the content: easy
Compatible scalar: although the scalars are cichlids, they are not aggressive. Favorable attitude even to small, peaceful fish and even to vivipartes. As neighbors, we can recommend: the Red Sword-bearers (they look great with black sklyarias), terntions and other tetras, danios, all soma, gourami and lyaliusi, parrots and eloi, other non-aggressive cichlids.
These South American cichlids simply fascinate with their elegance and beauty of sailing fins, which, like the wings of an angel, support it in dimensional weightlessness. Actually not for nothing foreign these fish are called angels.
Thorns is a small, popular dark silver fish. It can be found in any pet store and in many home aquarium. Its unpretentious content, ease of breeding, peaceful nature - deserves the attention of aquarists beginners.
Latin name: Gymnocorymbus ternetzi
Synonyms: Black, mourning
In English: Black skirt tetra, Black Widow tetra, Black tetra.
Order, family: Characteristic.
Comfortable water temperature: 21 - 24 p.
"Acidity" Ph: 5,7 - 7,0.
Rigidity: up to 6-16 °.
Aggressiveness: not aggressive 20%.
The complexity of the content: easy
Tarkarums are one of the most common catfish in our aquariums. Their popularity is due to the simplicity of content, endurance and peaceful disposition of these fish.
Latin name: Hoplosternum thoracatum.
Correct name: Many people call this fish tarakatum, probably comparing it with a cockroach, but the correct way to speak is thoracatum, from the Latin "thorax" - the shell.
Synonyms: Torakatum, Hoplosternum, Som Toraktum, Tarakatum Som.
Order, family: Carapace soms.
Water temperature: 22-28 ° C.
Ph "acidity": 5,8-7,5.
dH: Up to 25 °.
Aggressiveness: Not aggressive 0%.
The complexity of the content: Very light
Compatibility: In fact, any fish - these catfish do not pose any threat to other inhabitants of the aquarium.
Tsikhlazoma black-striped
Black-striped tsikhlasoma - one of the most popular fish of the family tsikhlazom. These are relatively small, unpretentious in keeping fish, possessing a beautiful, sophisticated body color and what is important, unlike many cichlids, have a more relaxed character.
Latin name: Cichlasoma nigrofasciatum. From the Latin words "nigro" - black and "fascia" - ribbon, belt, strip.
Russian synonyms: Black-striped cichlinoma, black-striped cichlasoma, black-striped cichlamose.
Foreign names: Zebra Cichlid, Zebra chanchito, Convict Cichlid, Zebrabuntbarsch Grunflossenbuntbarsch, Blaukehlchen.
Order, suborder, family: Perciformes (Perciformes), Okunevidnye, Tsikhlovye (Cichlidae).
Comfortable water temperature: 20-28 ° C.
"Acidity" Ph: 6.8-8.0.
Stiffness dH: 8-30°.
Aggressiveness: 30% are relatively non-aggressive, aggression is shown during the spawning and care of offspring.
The complexity of the content: easy
Some may say that the peak of their popularity has passed, that now there are many other more colorful forms of cichlids and cichlase in particular. However, the statistics are not lying! Today, black-striped tsikhlazoma, the most popular of all tsihlazom in search Yandex. Every month more than 2200 users of this search engine apply for this request.
We also recommend you to look at the colorful brochure "Popular types of aquarium fish". This brochure contains all popular types of fish, with a description of their conditions of maintenance, compatibility, feeding + photos.

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What is the optimum temperature to be in the aquarium?


Most aquarium fish will suit 22-26 ° C. Perhaps only discus and some labyrinth fish prefer water warmer: 28-31 ° C. Goldfish need water more cool. When the aquarium content of the temperature range of 18-23 ° C, they are quite satisfied. For quite a long time (a year or more) they can live at 25-27 ° C, but eventually they get sick - as a rule, they develop dysfunction of the swim bladder.
It is important to avoid significant (more than 2-4 degrees) temperature fluctuations. Its smooth changes are quite permissible, but sharp jumps during a day, or even several hours, are extremely undesirable. Meanwhile, this happens not so rarely, especially with small aquariums with a capacity of less than 60-50 liters. Relatively small volumes of water cool quickly and heat up quickly. For a long time, the open window in the cold season can easily draw a room. If there is no heater in the aquarium, then in a few hours of such aeration, the water in it will noticeably cool down. It turns out the fish, too, can catch a cold. And then "pick up" a bacterial infection or chylodonellosis. If there is no thermometer in the aquarium, such temperature fluctuations may go unnoticed by the owner of the aquarium. It should be noted that a small aquarium is immeasurably smaller than even a small natural reservoir, where water temperature changes proceed much more slowly (large masses of water slower and cool down and heat up more slowly). That is why fish are completely unsuited for sudden temperature jumps and these jumps can cause them great stress.


The temperature of the water in the non-heated aquarium is equal to or lower than in the room. For warm-water fish, this is not enough. Most aquarium fish and plants live at a temperature of 24 - 26 'and therefore need heating.

wild cat

The optimum temperature for your fish is 24-26 degrees. The thermometer will have to be bought as the temperature set on the heater may not correspond, for example, I now have a heater at 19 degrees, and in fact the water temperature is 26 degrees. so that…

The optimal water temperature for goldfish in an aquarium

مخلوق غريب

They contain goldfish in a wide, low and spacious aquarium with gravel or pebble soil. Acidity does not matter much (in general, goldfish are not capricious), and cruelty is not lower than 8 °. If the fish are sluggish, immobile, you can add salt at the rate of 5-7 g / l. The oxygen content should be high; air blowing and frequent water changes are recommended. Long-bodied fish need more water than short-bodied. Goldfish are quite peaceful, they can be kept together with other species, but voile tails are better separately, since other fish can damage their outfit. In fish tanks with bulging eyes, growths, there should not be stones and objects with sharp edges that can injure them. Water temperature from 15 to 24 ° C. In summer, you can gradually increase the temperature (up to 30 °).

Strunina Katya

The fish is suitable for keeping in a cold-water aquarium with a large space for free swimming. Beautiful in greenhouses. Due to the endurance of the breed, it can be kept in a decorative pond outside. Prefers a community of their own kind, bright light and an abundance of free space.
Temperature and oxygen regime
Goldfish are considered to be cold-water, as they easily tolerate a decrease in temperature, but they are most playful at a temperature of 22-24 degrees. Sharp temperature fluctuations are unacceptable! For ordinary goldfish, the water temperature in the aquarium can vary from 8 to 30 degrees, the optimum is 15–20 degrees, ornamental rocks are much heat-loving; The chemical composition of the water is not important. Goldfish (long-bodied, contained in pools and ponds) tolerate a decrease in temperature to 0 degrees Celsius and can winter under ice. It should be borne in mind that with a prolonged decrease in temperature, the fish may become more susceptible to various diseases, and warming of water leads to a decrease in the content of oxygen dissolved in it, from which cold-water fish suffer greatly, start to eat little and become exhausted. In hot weather, daily water changes prevent overheating of the aquarium.
For goldfish, aeration of water is obligatory, in which water is enriched with oxygen both from the surface of air bubbles formed by the nebulizer and from the surface of water. As a result of the circulation of water caused by the flow of bubbles, the oxygen-rich upper layers are mixed with depleted lower layers. In addition, the circulation is also useful in that it mixes relatively warm upper layers with cooler bottom layers, thus creating uniform temperature conditions inside the aquarium. If your fish are constantly at the surface of the water and swallow air, then this is the first sign of oxygen deficiency. It is necessary, or to change the water / part of the water, or to strengthen the aeration, or to plant fish.
The presence of a filter in aquariums with goldfish is also a necessary condition, as mobile and voracious fish, taking food from the ground and constantly rummaging in it, pollute the water. The power of the aeration compressor and / or filter (measured by the amount of distilled water in liters over a certain period of time) is selected depending on the size (volume) of the aquarium. The average is the power at which an compressor can pump over the entire volume of water in an aquarium in an hour. After several months of running an aquarium, you will be able to accurately set the power required in your case. If one type of filter is insufficient, you can use a combination of filters, a large selection of which is available on the market for aquarium equipment.
Goldfish are not very demanding on the chemical composition and hardness of the water, but before you fill the new aquarium with tap water, open a good tap and let the water flow for 5-10 minutes. This is done in order to reduce the content of heavy metals in it during stagnation in the pipes. It is necessary to fill the aquarium after planting, and so that the laid soil does not stir up. It is advisable to use a hose with a tip bent towards the top or an ordinary wide plate placed on the bottom. Filling the aquarium should not be to the brim, but leaving about 5 cm above.