The temperature in the aquarium for 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:

What is the optimum water temperature in an aquarium?

For all aquarium fish, the water temperature in the aquarium is important, so you need to monitor it periodically. For most of the inhabitants of the aquarium, a temperature range of between 22 and 26 degrees is suitable. Discus and labyrinth fish need a temperature of 28-30 degrees, and goldfish - from 18 to 23. Of course, they can live at elevated temperatures, but over time not to avoid disease: most often in animals dysfunction of the swim bladder occurs.

Ensure that there are no sudden changes in temperature (more than 4 degrees) in the aquarium. A smooth change is acceptable, but by no means drastic. However, jumps occur quite often, and especially for small aquariums, the capacity of which is less than 60 liters. This is due to the fact that a small amount of water heats up quickly, but cools down for a short time. So, for example, a window leaf that is open for a few minutes can cool the water very much, and aquarium fish will get chilodonellosis or a bacterial infection. If there is no thermometer in the aquarium, the owner will not be able to find out about such jumps in temperature, and the symptoms of the disease may appear very late.

In order to maintain the optimum water temperature in the aquarium all the time, a thermometer and a heating pad are needed. A thermometer should be in every aquarist. It should be located in the aquarium so that you can clearly see the temperature. This is important because the faster a person sees the changes and takes the necessary actions, the less the inhabitants of the aquarium will suffer. Recently, the choice of thermometers is huge, so everyone can choose a convenient one for themselves.

To maintain a constant temperature in the aquarium, you need a heating pad that heats the water to the desired temperature and then automatically turns off. If it has a high level of power, then residents of the aquarium are not afraid of drafts, temperature changes, or airing.

If you do not have the opportunity to constantly wonder what the temperature of the water in the aquarium, then you need a heating pad. The main thing is to choose a quality one, because otherwise it may not always respond to temperature drops, not turn on, or, on the contrary, warm water, not turn off, and your fish can boil. To avoid this, the heating pad must be changed periodically.

If you really care about your fish, then purchase only proven products for them; Do not rush to choose, consult with experienced aquarists, read reviews about the product and only then make a purchase.

The temperature of the fish tank

Often, novice aquarists do not rush to delve into how the temperature of the aquatic environment affects the fish and plants. Failure to observe the proper regime ends with the death of all creatures or various diseases. Sharp temperature fluctuations lead to the same consequences, when the inhabitants of the vessel experience shock and do not have time to acclimatize to new conditions. Let's consider what the normal temperature of the water should be in the home aquarium. Cold-blooded creatures are very dependent on this parameter, so this knowledge will help you avoid annoying blunders.

The direct influence of water temperature on the life of fish

In cold weather, fish minimize their activity, and their metabolism decreases. In the heat, many underwater dwellers experience a lack of oxygen, difficulty in breathing and tend to increasingly float to the surface. High temperatures lead to the aging of their body and accelerate growth. Especially important is the optimum water temperature in the aquarium for tropical species of fish. At home, their aquatic environment is almost always in one state and almost no differences are observed. Sudden changes in temperature invariably lead to a weakening of the immune system and the appearance of various infections. Creatures that hit the aquarium from our zone are more resistant. For example, a goldfish or carp are able to tolerate short-term changes in temperature.

What is the temperature of the water should be in the aquarium for fish?

Fish from different regions rarely get along in one vessel, because they are accustomed at home to a certain temperature of the liquid. For example, for creatures originally from temperate latitudes (barbus, danios, cardinal) is about 21 °, and for handsome discas from South America you need to maintain 28 ° -30 °. For beginners, it is better to select the most resistant species from the same climatic zones, so that you can easily adjust the temperature to a comfortable range of 24 ° -26 °.

How to make a water change?

Directly mixing cold fresh water with warm liquid from an aquarium is undesirable. For many fish, a similar phenomenon in nature is associated with the beginning of spawning or the arrival of the rainy season. In order not to cause a shock in their wards, it is better to refrain from similar experiments and equalize the temperature of the new water before the process of substitution.

Temperature conditions during transportation of fish

Many lovers lose the newly acquired fish only for the reason that they did not ensure the normal temperature in the container during their transportation from the store. Especially it concerns those cases when it is cold outside or the way home is not close. It is best to transport the fish in a thermos, which will protect them from possible stress. If you have only a package or a bank in your hands, then try to speed up the journey as much as possible so that the temperature change does not exceed two degrees.

How to maintain the optimal temperature of the water in the aquarium for fish?

The most often undesirable fluctuations occur in vessels installed near the windows, directly on the window sills, near the included radiators. Try to find a more comfortable place for aquariums, where the sun or other factors will least affect the life of aquatic creatures.

It is advisable to use high-quality heaters and thermometers, constantly monitoring water mode. If the temperature in your room changes by more than 5 degrees during the day, use instruments with automatic adjustment. It is desirable that the heater was washed with water, so mount the compressor near him. Moving bubbles contribute to better mixing of the liquid, all layers in this case will have a more uniform temperature of the medium.

What temperature should be in the aquarium and how to maintain it?

Many fish breeders initially face many challenges. The main task is the choice of volume, since most people live in apartments and have a small living space. Having determined the size of the aquarium and installing it, they begin to gradually equip the house for the fish. And here it is especially important to pay attention to the equipment.

In pet stores there is a large range of aquarium equipment and accessories. Many, having bought everything they need, often forget about heaters. If in the summer there are practically no problems with maintaining the temperature of the water in the aquarium, then in the cold season, overcooling may cause the death of the fish. In order to figure out what kind of heater you need, first determine what temperature should be in the aquarium.


On average, the water temperature should be 18-25 ° C. These numbers are the norm in winter. In the summer, it can rise to 30 °, which is the maximum for the normal functioning of fish. If you exceed the threshold of 30 ° C water needs to be cooled. To this end, aquarists acquire special "refrigerators", which are a few small fans installed under the aquarium cover.

All experienced fish breeders know that the optimum water temperature in an aquarium is from 18 ° C to 25 (27) ° C. In each case, it can change up or down, depending on the species composition of your aquarium. Therefore, in order to find out what the temperature should be in the aquarium, pay attention to its inhabitants.

What to use for constant temperature control?

In order for the water to have a constant temperature, special heaters are used, popularly referred to as "heaters." Depending on their design, these devices may have an automatic controller, which is activated if the water temperature drops below the set value. More simple models do not have this option, so their work must be under the control of the owner, who knows what temperature should be in the aquarium.

What are aquarium "heaters"

Most models of devices such as heaters for an aquarium, consist of a glass case with a spiral soldered into it, which radiates heat when heated. Not once there have been cases when, when cleaning an aquarium, the heating pad slipped from the hands and broke. Manufacturers, in order to avoid such situations, have invented new models that are more compact and do not beat on impact. They are made of special plastic alloys that are heat resistant.

Thanks to such devices, once having set the value on the regulator, you will never have to monitor what temperature should be in the aquarium, as it will be constantly under the control of the heater.

From the above it follows that the temperature of the water in the aquarium is one of its main parameters. It affects the metabolic processes occurring in the body of the fish. Now you know with what and how to maintain the temperature in the aquarium.


Content of publication

  • Neon content in the aquarium
  • Types and features of neons
  • Preparation for breeding neon
  • Breeding process
  • Fry care

Neon content in the aquarium

the neons

In nature, the neon fish lives in standing bodies of water and slowly flowing streams of the Rio Negru river basin. These are peace-loving, mobile and very fearful creatures, therefore it is better to keep them with a flock of at least ten individuals, so that their bright colors stand out from the rest of the fish.

These fish are kept mainly in the lower and middle layers of the water and can be easy prey for a large predator, so dangerous neighbors better not to sit down to the neons in the aquarium.

Neon should be kept in the aquarium at the rate of: for a couple of individuals 15-20 liters. The background and soil of the aquarium is desirable to choose a dark color. Thickets of both floating plants and planted along the side and back walls of the aquarium are also necessary. It can be echinodorus, all types of cryptocoryne, Javanese moss, Ceylon fern. Neon also actively use snags, stone caverns, and ceramic pots for shelter.

As for lighting, these fish prefer a weak top light source. They are sensitive to the characteristics of the water and the temperature in the aquarium should be between 22-26 degrees, pH 5. 0-6. 5, and the stiffness of 8 to 10 degrees. A weekly substitution of up to a quarter of the volume of water and constant aeration and filtration is recommended. Peat filtrate can be added.

Types and features of neons

Neon fish are green, blue, blue, false red, black. In all these species, the body is elongated and slightly flattened at the sides. The back is painted in a darker saturated color that brightens to the belly. Neon blue looks especially bright. Along the body of this fish is a longitudinal strip of scarlet color.

The length of this fish reaches 4 centimeters, although other species do not grow more than up to 3 cm. Sexual differences are not always distinguishable to the inexperienced eye: the male is somewhat slimmer than the female. The lifespan of neon is 5 years.

In nature, they feed on small species of crustaceans and insects falling on the surface of the water. Neons in the aquarium consume both live and dry food. In the form of live, they are usually given small moth, frozen cyclops, daphnia, mosquito larvae.

Preparation for breeding

For breeding neon in captivity you need to have a good experience.This process is quite complicated, since it requires many special conditions.

First of all, the multiplication of neons provides for spawning length of at least 30 cm. It should be darkened side and rear wall, kriptorina, fern or Javanese moss.

Before you fill the water in the aquarium for breeding neon, it should settle for two weeks. The water level should not exceed 20 cm, and the temperature should be in the range of 24-27 degrees, the water should be softened.

Experienced aquarists place a separator grid at the bottom of the pit, since neons can eat caviar. Between the bottom and the grid should be a gap of at least a centimeter.

Breeding process

neon caviar

Neon spawning takes place from October to January. For this you need to take females with a thick belly and one year old active males. At first, they are kept two weeks apart. Then the multiplication of neons begins with the fact that the fish are planted in the evening in spawning and not fed. Spawning occurs in the morning. If within three days the female does not spawn, then most often the males are replaced, less often the female.

When spawning, it is very important to preserve silence, otherwise the fish will be frightened. As soon as they put off caviar, all manufacturers are removed, the grid is removed, and the aquarium is darkened from all sides.

Pipette choose pop up unfertilized eggs. For the prevention of diseases, you can add a 1% solution of methylene blue to the aquarium at the rate of 3 cubic meters per 10 liters of water. centimeter.

Fry care

The incubation period of eggs lasts 18-26 hours. After a few days, the neon fry begin to feed and swim independently. They are fed with dry nauplii of crustaceans, ciliates, rotifers ground into dust. They reach sexual maturity by 7-12 months.

In order to accustom the small neon fish to the environment in which they will be released, they need to gradually increase the hardness of the water. This can be done with the help of the so-called "dropper". Water that has settled down during the week drips into the settler until the hardness of the water becomes normal.

The fry of neon fish are afraid of bright light and therefore feed them in low light that persists around the clock. In the first week, young animals feed very actively and quickly grow. Therefore, the feed should be very much. After a week, it should be gradually increased in size - not so carefully grind.

If there is a task of large reproduction of neons, then literally in 7–10 days of producers it is possible to plant them again to spawn. The female is able to postpone up to 400 eggs.

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…