The optimal water temperature in the aquarium


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

Breeding ornamental fish - a very exciting business. However, if you decide to devote yourself to this interesting hobby, you should know a lot of details and subtleties (first of all, such as the necessary temperature in the aquarium). Beginners often make a number of mistakes in the establishment of fish. To avoid them, we advise you to carefully read this article.

The temperature of the water in the aquarium is the most important factor when breeding fish

To make your pets comfortable in the water, you need to know exactly what the temperature should be in the aquarium. First of all, it should be remembered that each type of fish has its own water temperature. Someone likes cool water, and someone is more thermophilic. This should certainly be considered when you begin to equip the aquarium. Especially if you want to put there different fish. First make sure that all of them are able to exist at the same temperature.

Optimum temperature for different types of fish

So, you decided to buy a few fish. In this case, it will not hurt you to know what kind of temperature in the aquarium prefers. It's pretty simple. Most of the existing ornamental fish today are quite suitable temperature from 22 to 26 degrees.

There are some types of fish (there are few of them) for which the optimum temperature will be slightly higher - from 28 to 31 degrees. These include, above all, discus and labyrinth fish.

But goldfish, on the contrary, prefer a cooler water temperature in the aquarium - only from 18 to 23 degrees. Although they, of course, can live quite a long time (more than a year) in water, say, about twenty-five degrees. But after that, goldfish invariably develop various diseases and ailments. Therefore, it is better to maintain an optimal cool temperature.

The remaining types of fish, perhaps, are not so demanding and can quite comfortably exist at a standard water temperature in the aquarium of 22-26 degrees.

How to change the temperature of the water in the aquarium

Quite often, aquarists have to change the temperature of the water in an aquarium in order to ensure a safe life for their fish. For this there are special devices. Many aquariums were originally equipped with special heaters, thermometers and thermostats, which allow both to lower the temperature in the aquarium and vice versa, to heat the water.
If your aquarium is equipped with a full arsenal of such devices, it will be easy to maintain the desired temperature. How to lower or raise the temperature in the aquarium? Simply follow the thermometer and, if necessary, adjust the temperature.

The main thing - do not allow sudden drops. Sudden fluctuations in temperature (more than 2-3 degrees) can adversely affect the health of your fish. Stress, cold and other troubles will bring nothing but harm. Therefore, when buying an aquarium, choose a model with a thermometer so that you can constantly maintain the desired temperature.

Water temperature for aquarium fish

Aquarium water temperature

Water temperature for aquarium fish

One of the most important parameters of aquarium water is its temperature. Most aquarium fish feel comfortable at a temperature of 22-26 ° C. But there are fish that prefer a lower or higher temperature.

For example, discus is a heat-loving fish, a comfortable temperature for their maintenance is 28-31 ° C. But the Goldfish family, on the contrary, prefers cooler water at 18-23 ° C.

Thus, speaking of the temperature regime in an aquarium, one should take into account the comfortable temperature parameters for a specific fish. It should also be noted that the temperature of aquarium water directly affects the lifespan of some species of fish. For example, neons at a temperature of 18 ° C live 4 years, at 22 ° C - 3 years, 27 ° C - 1.5 years.

Perhaps the most important rule for an aquarist is to prevent sudden changes in temperature (2-4 degrees). Such vibrations are extremely harmful.
for fish.

Today, there are virtually no problems with maintaining the temperature regime in an aquarium. Therefore, when on the Internet you come across articles about the Soviet methods of “boiling with a kettle” involuntarily you are touched. Only one thing is frustrating - after all, articles on this topic are usually looked for and viewed by novices or young aquarists who are so easily confused with unnecessary, unnecessary information.

The nuances covered in this article for an experienced aquarist will not inspire innovation, but beginners will be noticed.

So, to maintain the required temperature regime of aquarium water, you need to buy two things at the pet shop:

1. Thermostat heater.

2. Thermometer with suction cups.

Regarding the temperature control of the heater for the aquarium - it is chosen based on the volume of the aquarium (its power must be appropriate). They fix it, as a rule, on the back wall of the aquarium, near the filter with aeration, so that it is completely immersed in the input. IMPORTANT: when setting the desired temperature on the scale of the thermostat, the first time (6-12 hours) watch the level of heating of the aquarium water. This is due to the fact that often the scale of the thermostat does not always correspond to the actual temperature of water heating (especially in Chinese thermostats) or the thermostat does not quite fit the volume of the aquarium. Failure to comply with this rule may lead to the fact that in the morning your aquarium may turn "into a saucepan with a good - elite ear."

Well, the second thing to which you should pay attention - the heater for the aquarium should be completely immersed in water. Do not allow it to be in the on state in air (in whole or in part). This will lead to its rapid overheating.

Regarding thermometers for aquarium - here everything is simple! They are:

glass (ordinary) ~ $ 1.2;

in the form of a self-adhesive strip thermometers for the aquarium~ 2$

(I do not recommend. creatively — yes, it is practical — no, especially since this strip “fades” over time);

and electronic thermometers for aquarium 12$;

When buying a thermometer should pay attention to the quality of suckers. If they are weak - the thermometer will often fall to the ground. In addition, there are fish that pathologically may not like the thermometer and they will deliberately drop it (I have suffered from these gays blue).

I think that with the heating of aquarium water everything is clear: - set, adjusted and forgot.

Let's now talk about what to do if the temperature goes over the top (from overheating or "summer in August"). Nowadays, this is also not a problem - the air conditioner will not only cool the room, but also lower the temperature of the water in the aquarium.

Another question is what to do if it is not? Or if you need to urgently lower the temperature? Ice from the refrigerator will come to the rescue. At one time, I poured water into plastic 2-liter bottles (carefully removing the bottle from the label and glue beforehand) and frozen them in the refrigerator. After lowering them into the aquarium and thereby lowered the temperature of the water to the desired.

This method of lowering the temperature has two minuses: firstly, the frozen bottles and ice heat up quite quickly - they often need to be frozen, and secondly: sudden, frequent temperature drops are poorly tolerated by aquarium fish. If the temperature is "tolerable" it is better not to add ice bottles.


Video about the temperature and care of the aquarium

What temperature should be in the aquarium and how to maintain it :: Care and nurture

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

In order to provide aquarium inhabitants with comfortable conditions, it is necessary to strictly observe the temperature conditions that will be optimal for them. For each type of fish has its own comfortable temperature habitat.

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Some fish need relatively cool water, others are more thermophilic. This must be taken into account when purchasing an aquarium, as well as when selecting different types of fish. Beforehand, one should make sure that they can coexist at the same temperature.

Optimum temperature for different types of aquarium fish

For the vast majority of ornamental fish, the optimum water temperature in an aquarium is from 22 to 26 degrees. The first is to focus on this temperature. However, there are exceptions. Some fish species prefer warmer water in the aquarium. These, above all, include some species of labyrinth fish and all discus.
For goldfish, lower water temperatures are more comfortable. The ideal temperature for them is from 18 to 23 degrees. These fish for quite a long time can live at a higher temperature, but later it causes them to develop various skin diseases.
Sharp temperature fluctuations of more than 3-4 degrees should be avoided. A smooth change is quite acceptable, but jumps that occur within one day, or even several hours, are very undesirable. This often happens in small aquariums - less than 50 liters. Such small volumes are very sensitive to changes in ambient temperature, they cool down quickly and heat up quickly.
A pane open for several hours during the cold season can cause a change in temperature in the aquarium by several degrees. In this case, the fish can catch a cold. After which they will need special treatment. In the natural habitat of such temperature fluctuations do not exist, since large masses of water rather slowly cooled and heated. Therefore, fish are not adapted to extreme temperature fluctuations, and apart from diseases, this can cause them stress.

Maintain aquarium water temperature

To maintain a constant water temperature in the aquarium, heaters of various types are used. Temperature control is controlled by thermometers. If the temperature fluctuations in the room exceed 4-5 degrees, it is advisable to use heaters with automatic temperature control, which allows you to maintain a constant set temperature.
It is important to evenly distribute the heat from the heater to the aquarium. To do this, the heater must be washed with water or air bubbles coming from the filter and compressor, so that the heated water spreads throughout the tank.

Related videos

I have an aquarium how many degrees usually it should be water?


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.
Sometimes it is necessary to carefully monitor not only the temperature of the water, but also the temperature of the air above the water. This is especially important when keeping maze fish that regularly capture air from the surface. Sufficiently heat-loving Siamese fighting fish (cockerels) and lyalius can get sick or even die “breathing” the air, which is 5 degrees and colder than the water where these fish live. When the content of labyrinth fish some caution when airing the room is especially necessary.
Overheating can also be very dangerous. Worst of all, it is carried by well-fed fish. Warm water contains much less oxygen, and well-fed fish especially need it. Overheating can occur from solar heating (if the aquarium is so located that direct sunlight falls on it), from the heat of the radiators (if the aquarium is located close to them, it is 50 cm or less), from lamps that illuminate the aquarium, especially powerful, and the aquarium is covered with a deaf lid. Not without reason, plant lovers, illuminating their aquariums with powerful lamps, make additional ventilation holes in the aquarium covers and fit computer coolers for them. Using the cooler, you can reduce the temperature of the surface layers of water by 1-3 degrees.
From the foregoing we can draw the following conclusions:
A thermometer is an absolutely necessary measuring instrument for an aquarist. It should be placed in the aquarium so that it is noticeable even with a glance casually thrown at the indoor pond. The aquarist should know about the failure of the temperature regime in the aquarium as soon as possible and take action immediately. Thermometers in the glass case alcohol and especially mercury are quite accurate. But they are immersed directly in the water of the aquarium and either are attached to its wall with the help of a sucker (which does not always look beautiful), or they set sail for free swimming. The latter option leads to significant inconvenience. A thermometer, if it does not float somewhere in an unknown direction, it will certainly turn in such a way that the scale will not be visible. Liquid crystal thermometers are much more convenient. They look like a small strip attached to the glass of the aquarium from the outside. They measure temperature less accurately, but for amateur purposes, they are excellent and their readings are always in sight.

What is the maximum water temperature for aquarium fish?


Lighting and water temperature in the aquarium
How to light the aquarium? When addressing this issue, the following points should be taken into account: the natural light illumination of the aquarium, the power of the lamp, the depth of the aquarium, the need for specific types of fish and plants for a particular light intensity (spectral composition is important for plants), the duration of illumination.
For example, if an aquarium is located near a window, the need for its inhabitants in artificial light is less (especially in summer). Fish, with the exception of the inhabitants of shaded reservoirs and those that are active at dusk, are not so whimsical to the lighting of the aquarium, like plants. The life of the latter strongly depends on the quality and quantity of light. In most cases, the aquarium should be lit 12 - 14 hours a day.
What fluorescent lamps can be used to light the aquarium? Aquarists use the following types of lamps: LB, LD, LTB, LHB, LBU, LDC, and some others. Usually use lamps with a capacity of 20 to 40 watts. It must be remembered that the light output of fluorescent lamps is 2.5 - 3 times higher than incandescent lamps.
Approximate standards of lighting power: 0.4 - 0.5 watts per 1 liter of aquarium volume - for fluorescent lamps, 1.2 - 1.5 watts per 1 liter - for incandescent lamps. For fish and plants that cannot tolerate bright light, these rates are reduced. It should be remembered that the deeper the aquarium, the greater must be the power of the lamps.
What kind of lamp is better to use for lighting aquarium plants? When breeding aquarium plants, the best results are obtained with a combination of lighting: incandescent lamps plus fluorescent lamps such as LD, LDC (during flowering and fruiting, plants need blue rays, which give the lamp with this marking). The power of incandescent lamps for lighting aquarium with plants - 25, 40, 60 watts.
If you are mostly interested in fish, then in the presence of widespread and unpretentious plants, you can use any fluorescent lamps, preferably warm daylight, in the marking of which there is a letter B (LB, LTB, etc.), as well as incandescent lamps, better than krypton ones. The latter differ from ordinary lamps in that their flask is filled with krypton and they burn brighter, giving more orange rays.
In my room, the temperature does not rise above 18 - 20'C. Will fish live at this temperature? 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.
The most primitive heater is an incandescent lamp placed outside the side wall of the aquarium below the surface of the water and covered with a metal reflector. The lamp should not be more powerful than 40 watts from the strong and uneven heating of the glass can crack. This heater is not very convenient, since a lot of heat is wasted. In addition, at night it has to be turned off. Plants stretch in the direction of the lamp and bend, and the side glass quickly overgrown with algae.
The most commonly used heaters from nichrome wire, wound on a glass tube, which is placed in a tube with sand (they are produced by our industry). The power of such heaters from 5 to 100 watts. They should be used in full accordance with the instructions. Especially it is necessary to ensure that the upper end of the heater protrudes from the water - getting it into the tube results in damage to the device.
To maintain the temperature of the water in a 25-liter aquarium is not higher than in the room, 0.2 l is required for every liter of water, 0.13 in a 50-liter tank and 0.1-watt in a 100-liter tank. To keep the temperature constant, use a heater with a thermostat. The industry produces a variety of temperature controllers. One of the most common PTA-W.


maximum! maximum when I turned on the heater and cooked the soup of my fish !! Until now, from myself in shock T was about 35-40. The minors are dead ((
therefore, 32 is the maximum but the fish remained alive))

Kostyan Zhitnik

Zhenya, depending on what kind of fish ... In general, in summer, at room, almost all fish live normally ... And in winter, it is better to put a heater ... But I do not recommend to reveal the maximum temperature by experience, it’s a pity to fish)))


When treating most aquarium fish (except gold), some aquarists raise the temperature to 34 degrees. But for the content, of course, need a lower temperature. The discus discusses separately - they need a temperature of about 30 degrees ... and gold ones - they need colder water than others.

What is the temperature of the water that guppies should have?


In general, a guppy fish is not whimsical, with us it even lived at room temperature without a heater and even multiplied !! !
Aquarium needs a square, (round is garbage, even though it looks beautiful) - it costs from 1000 rubles
Next, you need air (I do not know how to properly name it) - it is from 300 rubles
and you can still buy a heater - from 300 rubles.
Look algae on Avito)


The temperature of the guppy content depends on what you want to achieve. So that the fish would develop rapidly, multiply rapidly, be small and bright, but did not live long, then + 26 ° C, even +28. If you want to live long, grow to the maximum size, but develop slowly, then from +18 to +24. Carry cooling and even lower. The heater therefore can not be set. Room temperature fits in every conceivable range. Soil recommend gravel 3-5 or 5-8 mm, you can and pebbles, you can, and generally without soil, as such. Water - hard to saturation, even brackish up to 5-7. The aquarium can be the simplest of 10 liters. In St. Petersburg from 250 rubles. You, most importantly, start, then you will understand. Remember, aquaria is a contagious chronic disease! You can then not get rid of all my life! Of course, it is better to have an aquarium of 80-100 liters, a good filter, a time relay for a fluorescent lamp illuminator ... The main thing is to start! Such an aquarium with the equipment of a good company - thousands of 10.