home Aquarium How to increase the temperature of the water in an aquarium

How to increase the temperature of the water in an aquarium

Table of Contents

How to increase the temperature of the water in an aquarium without a heater

Fish are cold-blooded creatures, their body temperature is determined by the temperature indicators of the surrounding space. The activity and vitality of the fish depends on the comfort of the water. With a decrease or excess of the permissible degree, the likelihood of diseases in pets increases, but sharp temperature fluctuations are even more dangerous. There are different methods for normalizing the water temperature in a fish tank.

How to increase the temperature in an aquarium

The water temperature can drop for various reasons, even after airing the room. The owner may not understand why his pets suddenly feel worse.

  • Buy an aquarium water heater, turn it on, bring the water to optimal condition.
  • Pour a small amount of boiled water into the tank (no more than 10% of the volume). The addition should be gradual so that the water warms up by 2 ° C every 20 minutes. It is necessary to act carefully, making sure that the boiling water does not get on the passing fish.
  • Put a plastic bottle filled with hot water into the aquarium. She will float on the surface of the water, sharing heat with the surrounding space.
  • If the fish are not feeling well, add vodka to the aquarium (1 tablespoon of alcohol per 100 liters). After this method of treatment, flushing of the reservoir will be required.

Optimal parameters

Speaking of what temperature the aquarium water should be, take into account the species of pets. For example, the warm-water tropical species, the Siamese cockerel, needs high-quality water heated to 26. 28 ° C. Cold-water species are less demanding on living conditions. Neons in cool water (20. 22 ° C) have a longer lifespan. This must be taken into account when forming a group of inhabitants of a common aquarium.

A universal indicator suitable for all aquarium species is 25 ° C. This temperature can be set in a home aquarium with many different species, and there will be no mistake.

Temperature table for each type of fish

The correct temperature regime in the aquarium is one of the most important factors in ensuring a long and comfortable life for your fish. For tank owners, a table is provided that shows the preferred water parameters for the most common species of aquarium inhabitants.

fish species average temperature range, ° C maximum and minimum permissible temperature, ° C
scalars 24. 27 (the higher the temperature, the faster the individuals grow and reproduce better, but the lifespan is reduced) 19. 30
guppy 23. 26 (in cool water, the fish becomes larger, but loses its immunity) 15. 30
swordsmen 23. 25
neons 22. 25 17. 29 (with extreme parameters, the lifespan of individuals becomes shorter)
siamese cockerels 24. 28
gourami 22. 26 20. 30 (fish do not live for a long time at extreme parameters)
mollies 25. 27
zebrafish 21. 25
parrots and other cichlids 24. 30 (the higher the temperature, the richer the color) adults up to 6 hours are able to endure the extreme rise and fall of temperature
goldfish 20. 24
barbs 20. 27
catfish (pterygoplichta, agamixis, bunocephaly, synodontis) 24. 27
red-eared turtles 24. 29

Temperature control methods

Having found out what temperature is comfortable for the fish species living in the aquarium, it remains to control it. Various devices are used as control means:

  • Glass lined thermometer. Provides accurate readings, easy to use, inexpensive. The only negative is that if the device breaks, toxic mercury will enter the water, and the fish will be poisoned.
  • Adhesive test strip. Convenient to use, simply glued to the surface of the tank. Minus. insufficient accuracy of indicators.
  • Alcohol-filled thermometer. Convenient and inexpensive option. But gradually the reliability of the indicators decreases.
  • Electronic thermometer. Provides the most accurate metrics. But it’s expensive.

How To Heat Your Fish Tank | Aquarium Heating | Three Methods

How to lower the temperature in an aquarium

The water temperature can rise in winter when the radiators are working intensively in the room, in summer in bright sunlight if the apartment is on the south side. You also need to check if the sensor on the aquarium heater is working properly. The owner should not allow the water temperature to rise above 30 ° C, otherwise the fish will cook, and the aquarium will literally turn into a container with fish soup.

It should be noted that the fish tolerate overheating worse than hypothermia. The combination of high temperature and excess of nitrates in water has a particularly negative effect on the body of pets.

Ways to lower the temperature and save the pets:

  • Pour cold water into the aquarium. It is correct to do this in small portions so that the cooling is gradual.
  • Put a bottle of water from the refrigerator into the reservoir.
  • Leave the compressor on until the temperature has dropped to normal.
  • If, in addition to cooling, urgent cleaning is required, then hydrogen peroxide is added to the water (1 tablespoon per 100 liters).


This turtle species belongs to the freshwater turtle family. In nature, they can be found in small.

The biggest challenge an aquarist ever faces is maintaining a constant pH level. Many amateurs.

Water in an aquarium with plants In the step-by-step instructions for creating an aquascape for beginners, you already.

What water temperature should be in the aquarium for fish?

Fish from different regions rarely get along in one vessel, because they are accustomed to a certain temperature of the liquid at home. For example, for creatures from temperate latitudes (barbus, zebrafish, cardinal), this is about 21 °, and for handsome discus 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 within a comfortable range of 24 °.26 °.

Aquarium heater with thermostat

The main inconvenience when using the heater is associated with the need to constantly monitor its operation. Even after reaching the desired water temperature, the device still continues to function and must be disconnected from the network manually.

To get rid of this problem, a special device is used. a thermostat, which is a device with a built-in temperature sensor. It allows you to turn off the heating element when a preset value is reached and turn it on again when the water starts to cool.

Thus, a stable microclimate is achieved without temperature fluctuations. The use of modern technologies allows the manufacture of very compact and easy-to-use thermostats.

By manufacturing technology, they are divided into two types.

Electronic. They have high accuracy (most of them are equipped with information boards). The disadvantages include the relative high cost and lack of reliability.

Mechanical. They are found most often, differ in stability and reliability during operation, at a cheaper price. They often distort real readings by several degrees, so a separate thermometer must be used to fine-tune the device.

According to the level of safety during operation and durability of the devices, thermostats are divided into:

  • Remote. located outside the aquarium, not influenced by the aquatic environment and waste products of aquatic organisms. This increases their service life and makes it possible to use cheaper heaters and replace them without additional costs. To determine the operating mode, a separate temperature sensor is used, which is located in the aquarium and is connected with a wire to the thermostat.
  • Built-in. they are mounted in a sealed case together with a heating element. With this configuration, the entire water control and heating system becomes very compact and easy to use.
READ  How long should a compressor run in an aquarium

The latter type of construction is most popular among aquarists and is often made in the form of an elongated glass bulb, inside which is an electric heater and thermostat. For greater thermal conductivity, the space of the flask is filled with the smallest ceramic filler.

The tightness of the structure is ensured by a rubberized or plastic cap through which the power cable passes. There is also a regulator that allows you to set the required temperature.

Well-known brands of aquarium equipment. Eheim, Fluval, Ferplast, Aquael, Tetra. produce reliable and high-quality immersion heaters for aquariums with a power thermostat from 25 to 300 W. Such devices are capable of providing the necessary conditions in aquariums up to 1500 liters.

To reduce the likelihood of water overheating, there is a practice with the simultaneous use of several less powerful thermal devices. In the case when it is not possible to purchase the necessary equipment, you can make it yourself.

Types of aquarium heaters

In order to be able to create the most comfortable living conditions for fish and plants, special devices are used. aquarium heaters. There are several types of them, but the principle of operation is the same for all. electrical heating of the element in a sealed environment. The most commonly used heaters are:

Submersible (plastic, glass, titanium). Consists of a heating element built into a shock-resistant, heat-resistant housing in the form of a flask or an elongated cylinder, and is designed to be lowered into an aqueous environment.

Flowing. It has a plastic housing and is mounted vertically on the return hose of the external filter, which saves internal space and creates a stream of warm, aerated water.

Heating cables. Installed under the ground and allow you to evenly warm up the entire aquarium, create additional water circulation.

Heating mats. They are rectangular mats that are installed under the aquarium. The generated heat evenly passes through the bottom and raises the temperature of the water.

It is generally accepted that sufficient power of the heating device should correspond to 1 W per liter, but in practice, 0.7-0.8 W per liter is often used.

Aquarium heater with thermostat

One of the important conditions for keeping fish at home is to maintain a stable temperature in the aquarium, which, without human intervention, always corresponds to the indoor microclimate. Sharp fluctuations in the range of 2-4 degrees, caused by an open window or turned off heating, negatively affect the health of aquatic organisms. This is especially true for aquariums with small displacement, where temperature changes can occur in a matter of minutes. In addition, during the year, situations arise when the room is too cold for a long period, and this can cause serious damage to the entire ecosystem.

Temperature conditions when transporting fish

How to make a water change?

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

What to do when the temperature drops

The reason for the decrease in water temperature can be banal airing of the room. The owner of the aquarium may not even immediately notice that the fish have become ill. To raise the temperature to standard values, you need to go to some tricks.

  • If you have a thermal pad, you’re in luck. connect it and heat the water to the required parameters.
  • You can add a little boiled water to the reservoir (no more than 10% of the total). But this should be done gradually, adding no more than 20 heat for every 20 minutes.
  • The previous method requires care so that the 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 really bad, “give them a drink” with cognac (or vodka). 1 tablespoon is enough for 100 liters of water. alcohol. This will cheer up the inhabitants of the aquarium a little, but the container will soon have to be rinsed.

Aquarium water temperature and fish behavior.

Water temperature affects the activity and behavior of fish, which can be used to reduce the scale of excavation that many South American cichlids are comfortable with and reduce aggressiveness. As a rule, lowering the temperature in the aquarium by 2. 3 ° C promotes calmer behavior of the dominant fish, which attack their neighbors less in cool water. Some cichlids, preparing a place for laying eggs, dig deeply into the soil. This activity can radically change the appearance of the aquarium, which is not always pleasant to the aquarist. With a decrease in water temperature, the intensity of excavation decreases.
It is necessary to reduce the water temperature gradually: by 1-2 ° C per day. In most cases, 23 ° C will be the limit value, below which the temperature should not be lowered.

What to do if there is a sharp rise in temperature in the aquarium (overheating of the aquarium) and the fish swim sluggishly near the surface, capturing air through their mouth?

If the aquarium overheats, it is necessary to increase the aeration to the maximum possible. If the pump of your aquarium filter allows you to suck in air, which is then expelled along with the stream of water, be sure to turn on this mode! Remove the lid from the aquarium and let a plastic bottle of cold water float into the water. In the first 10 minutes, you can reduce the temperature by 2 ° C, for the next 20. by another 1-2 ° C. If the compressor is low-power and does not allow increasing aeration, and there is no pump, or its design does not allow aeration of the water, then continuously shake the water surface aquarium at least with your hand. Any mixing of water enriches it with oxygen! If, despite all the measures taken, the fish continue to swim very sluggishly near the surface and breathe heavily, then add pharmaceutical (3%) hydrogen peroxide to the aquarium water at the rate of 20-25 ml per 100 liters. Hydrogen peroxide, once in the aquarium, quickly breaks down into oxygen and water. This is an environmentally friendly substance, in the indicated doses it will not harm fish in the least. Long-stemmed plants (kabomba, pinnate) from a dosage of 25 ml per 100 liters or more may suffer, but the fish will be saved. In addition, at the indicated dosage, hydrogen peroxide is a good prophylactic antiparasitic, antifungal and antibacterial agent. However, peroxide should not be used in a shrimp tank.

What water temperature should be considered dangerous for aquarium fish?

Talking about the water temperature that is too high for fish, I did not indicate exactly what temperature it is. And this is no coincidence. The limiting maximum water temperature that a fish can still tolerate depends not only on its type, but also on the temperature at which it was kept before the temperature jump. For example, goldfish adapted to a temperature of 28. 29 ° C can withstand a short-term increase in the water temperature in an aquarium up to 41 ° C. but for fish adapted to 15 ° C. a rise in temperature to 41 ° C will be fatal. In general, for most aquarium fish living at a temperature of 25 ° C for a long time, it will be dangerous to heat the water to 32 and more degrees C. This circumstance must be taken into account when treating fish by increasing the water temperature.

Aquarium water temperature and treatment for aquarium fish.

It is widely believed that if the fish are sick, the water temperature should be raised. it will help the treatment. Wait take your time. We already know that oxygen in water decreases with increasing temperature, so if the symptoms of the disease manifest themselves as oxygen starvation, then the temperature cannot be raised.
Also, you can not raise the water temperature with a high content of nitrates and phosphates in the aquarium and when the maximum permissible concentration for total ammonia and nitrites is exceeded. Therefore, hyperthermal processing of fish can only be carried out with water quality indicators close to ideal.

But most importantly: fish do not like rapid changes in the temperature of the water in the aquarium! In addition, they do not like rapid temperature changes and beneficial bacteria that provide biological balance in the aquarium 2).

At first glance, this may seem strange, because the aquarium is inhabited by cold-blooded creatures: their body temperature is the same as the temperature of the surrounding water 3). Scientifically speaking, fish. poikilothermic animals. They do not need to spend energy to maintain a constant temperature of their body, so the fish will not shiver from the cold, they will not sweat from the heat. also. Then what and why is water that is not suitable for the temperature dangerous for them??
The fact is that aquarium fish mainly come from the tropics, where the water temperature in winter and summer differs very slightly. Therefore, their metabolism is tuned to a fairly narrow temperature range. In other words, aquarium fish digest food best, develop, and resist pathogens in a limited temperature range. Scientists say they are stenothermal fish.

READ  How to properly plant plants in an aquarium

In natural reservoirs, seasonal and daily fluctuations in water temperature are distinguished. Even if seasonal fluctuations in temperature in the historical homeland of a certain aquarium fish do take place (in the tropics, seasonal fluctuations in water temperature are not well expressed everywhere and it depends on the characteristics of the climate of a given region), then the range of these fluctuations is incomparably narrower than in our temperate latitudes, and the change water temperature in a natural reservoir is slow. Therefore, fish adapt well to a gradual change in temperature if it covers several days, or even weeks, but not hours.
Daily temperature changes, as their name suggests, occur quickly: within a day. But due to the high heat capacity of water in a large-volume reservoir, they are insignificant and usually do not exceed 2-3 ° C. At night, the water cools down a little.
The aquarium is incomparably smaller than a natural reservoir, so it can cool down by 3-5 ° C (or even more!), Or overheat within just a few hours if the temperature in the room where the aquarium is installed suddenly drops or rises quickly. The smaller the aquarium, the faster the water temperature can change in it. It is especially important to remember this for the owners of the now fashionable nano-aquariums.
Another reason for a sharp jump in temperature in the aquarium can be a water change. Do not pour too cold or too warm water into the aquarium. Those who like to take water for a change directly from the tap (without settling) should be especially careful in winter, when the tap water is very cold: 8 ° C or less.
Rapid changes in the temperature of the water in the aquarium are unnatural for tropical aquarium fish and they negatively affect their immunity. If the aquarium does not have a thermometer, temperature fluctuations can go unnoticed by the owner. And he will only be amazed at the various fish ailments appearing out of nowhere. As a rule, sudden cooling causes ichthyophthyriosis or chylodonellosis. but the occurrence of other diseases is quite possible, for example, bacterial septicemia.

With gradual adaptation, some aquarium fish (zebrafish, thoracatum catfish, speckled catfish, guppies, not to mention goldfish, which are eurythermal 4)) can adapt to a decrease in temperature by 10, or even all 15 ° C. This is well known those aquarists who take out in the summer “to the dacha” and settle their pets in the garden pond. From mid-August, in our latitudes, the water begins to cool down a little, but the fish can live on the street until September, or even take part of September if the autumn is warm. It goes without saying that the successful stay of fish in an open reservoir is possible only if they are free from pathogens, otherwise during the period of adaptation to new summer conditions or during a cold snap they will certainly get sick.
The ability of aquarium fish to adapt can also be explained by the inconsistency in reference books regarding the optimal temperature for keeping a particular species. As a rule, the earlier the book is published, the lower these temperatures. For example, the information given by N.F. Zolotnitsky in his fundamental work “Amateur’s Aquarium”, written at the turn of the 19th and 20th centuries. There are very low values ​​according to our present ideas. So, according to Zolotnitsky, lalius withstands 12 ° C. and spawns as soon as the water temperature in the aquarium begins to exceed 21 ° C. This is due to the fact that heating the water in the aquarium in those days was not an easy task. For the most part, the temperature of the water in the indoor reservoirs was really “room temperature”, and in winter it was not hot in houses with stove heating. about 19 ° С 5). In such conditions, those fish survived that could adapt to them. For the generations that appeared in the aquarium, the specified temperature regime was already “native”. It should be noted here that there are fish that cannot be “persuaded” to live at low temperatures. These are, for example, discus, freshwater rays, altums, uaru. In the natural biotopes of these fish, the water almost constantly has a temperature of 27-34 ° C. Another thing is lalius, whose habitat covers the northern regions of India, where in winter the water temperature can really drop to 12 ° C.

In an aquarium with labyrinthine fish (these are gourami, cockerels, lalius), which to a large extent breathe atmospheric air, it is necessary to control not only the water temperature, but also the air temperature above the water. Labyrinth fish can get sick or even die “breathing” air, which is 3.5 ° C colder than the water where they live. Therefore, when keeping these fish in an aquarium without a lamp cover, some care when ventilating the room where the aquarium is located is especially necessary.

what to do if the water temperature in the aquarium drops sharply

What to do if the temperature of the water in the aquarium drops sharply?

First, you need to establish the cause of this fall: close the open window, replace the broken heater. If there is no spare heater at hand, then provide additional heating of the room, and let a plastic bottle filled with warm water float into the aquarium. You will not let the bottle float into the nano aquarium, as the water from it will overflow, but you can lean a plastic bag with warm water against the wall of the aquarium. Having achieved a temperature rise of 2-3 ° C, it is necessary to assess the condition of the fish. If they began to gain color and confidently swim (without loss of coordination of movements), then nothing more needs to be done. But if they continue to lie at the bottom (which happens if the aquarium is very cold), then you will have to take emergency measures to revive them: pouring cognac or vodka into the aquarium in an amount of 30 ml / 100 l gives a healing effect. The fish will start swimming in 10 to 15 minutes. After 24-48 hours after adding alcohol to the aquarium, the water may become cloudy and the formation of mucus on the glasses and leaves of plants, which is not dangerous for fish, but certainly will not beautify the aquarium. To prevent cloudiness, you should, without waiting for it to come, filter the water through activated carbon or replace a third of the volume of water. You will have to work hard, but you will save the fish.
How else can you heat the water in an aquarium if you don’t have a working heater at hand? Maybe the pictures from old books below will inspire DIY lovers to create, but it would be better to get a new aquarium heating pad as soon as possible. A separate material will soon be written on how to choose the right aquarium heater based on the volume of the aquarium and its contents.

Here are the drawings from old aquarium books (“Room aquarium”, ed. By MA Peshkov, published by the Moscow University, 1961 and “Aquarium fish farming”. MN Ilyin, published by the Moscow University, 1977), from which one can see how you can heat your aquarium if you don’t have a branded aquarium heater at hand. All of these devices are far from secure. Using the first two can lead to cracks in the aquarium glass if heated too much, and the next two can lead to electric shock.

Overheating an aquarium can be even more dangerous for aquarium fish than cooling it down. The fact is that with an increase in temperature, the metabolic rate of fish increases significantly, which means that the need for oxygen also increases. Well-fed fish especially need oxygen. But here’s the problem: the solubility of oxygen in water decreases with increasing temperature. As a result, the fish begin to choke and may die from asphyxiation.

The decrease in the solubility of oxygen in water with increasing temperature. It can be seen that at 30 ° C, half as much oxygen can dissolve in water than at 0 ° C. No matter how good the aeration of the water is, at 30 ° C only 7.63 mg / l of oxygen can be dissolved in the aquarium water. I note that testing water for oxygen in real-life aquariums showed a much lower oxygen. As a rule, unless the aquarium is a “herbalist” with “bubbling” plants, then oxygen in it, even with good aeration, does not exceed 5 mg / l. And this is at a temperature of 25 ° C. and not 30 ° C. !
The graph is based on data from the book by V.I. “Ecological aspects of ichthyotoxicology”, Moscow, 1987

The most common cause of overheating is the failure of the aquarium heater, which continues to heat and heat despite the fact that the set temperature has long been reached and exceeded. In addition, direct sunlight and heat radiation from radiators (if the aquarium is too close to them) in the sudden start of the heating season can be possible causes of overheating.

READ  How to equip a red-eared turtle aquarium

The temperature of the water in the aquarium. the most important factor in his well-being.

The need for optimal performance

In one home freshwater reservoir, it is recommended to keep fish that need the same living conditions. Individuals are divided into two types. habitual to warm water and cold. From the former, those who consume oxygen in large quantities and less are emitted. The latter can withstand low temperatures, but they need oxygen to the fullest.

Each type of fish has its own temperature parameters. Warm-water people do not like its decrease below 20 ° С. They also need a water heater with a compressor to evenly distribute the flows. Cold water people will not like an increase of more than 25 ° C. Sharp fluctuations are also detrimental to fish. Temperature changes of 2-4 ° C are allowed.

The optimum temperature regime is 22. 26 ° С. When it rises, the fish become restless, of an unnatural bright color, bacteria multiply, there is a deficiency of oxygen, they gasp for air.

In cold water, they are inactive, refuse to eat, are pale in color, or, on the contrary, are too active. There is a danger of fungal and viral diseases. At the same time, the fry die very quickly.

The changes lead to shock and death of the pet in the home aquarium. Experts advise maintaining a constant temperature regime; when changing water, it should be 1 ° C higher than in the tank.

Mr. Tail recommends: how to lower the temperature

You should be aware that overheating can do more harm than cold. For a favorable temperature, aquarium owners use water heaters with thermostats, with their help they monitor the indicators. In hot weather, the best way to cool the temperature in the aquarium and in the room is an air conditioner.

If it is not there, you can apply other methods:

  • Use a regular fan.
  • Fill a plastic bottle with cold water and place in the aquarium or ice from the refrigerator in the same container.
  • Pour in hydrogen peroxide (1 tablespoon per 100 liters) for oxygen enrichment and disinfection.
  • Do not turn off the compressor to maintain aeration.

Heat may be caused by direct sunlight, high room temperatures, proximity to heaters, powerful lamp, or a tank without a lid.

Experts recommend not to feed the fish with protein food in the hot season and change the water more often, but in small volumes.

An aquarium refrigerator will help in the heat, but it is too expensive and not available to everyone.

How to raise the temperature

When choosing, the dimensions of the tank are taken into account so that the device drops to the desired mark. Pay attention to tightness and power (for 100 liters. 100 kW or more). The desired temperature is set on top of the heater. They check it with a thermometer, often the device does not guarantee accurate readings. Or they purchase a separate thermostat with a digital display, thus using double protection.

There are also devices that are installed under the ground for heating and outside. If the thermometer has gone down, take the following measures:

  • Lean a heating pad against the wall.
  • Move the aquarium to a heat source.
  • Dip the hot water bottle.
  • Use an air conditioner with a warm setting or a regular hair dryer.
  • Install an incandescent lamp next to it.
  • Immerse the external filter in warm water (not hot).
  • Add 30 ml per 100 liters of vodka, brandy (in case of emergency).
  • Carefully pour water from the kettle, not very hot.

At the same time, doors and windows are closed so that there is no draft, hot water cannot be poured into the tank. It happens that increasing the temperature is necessary for the treatment of fish and reproduction.

Temperature measurement

Maintaining the temperature is important in hot weather and when it is very cold. To measure it in an aquarium, external and submersible thermometers are used:

  • Liquid crystal or self-adhesive. fixed on the outside of the tank, even on an uneven surface. With the help of a special paint, it changes color when heated. Among the disadvantages. low measurement accuracy, depends on sunlight, moisture.
  • Alcohol. mounted inside on a suction cup, it has a low price, but there are errors in the readings, it can be easily broken.
  • Digital. battery operated, glued to glass, sold and submersible. Of the shortcomings. an error of one degree.
  • Laser. a novelty, used for all cases of temperature measurement. The price is high.
  • Electronic. submersible or external with an underwater sensor. Data is displayed, measurements are accurate, but expensive.
  • Mercury is accurate, inexpensive, convenient, but dangerous. If it crashes, the inhabitants of the reservoir will die.

When using a thermometer, you should know: the surface for fixing it must be flat and clean. It is recommended to install it away from the heater and in the middle layer of water, in a place accessible for observation.

Aquarium water temperature: norm and indicators

For the normal functioning of domestic fish, a certain temperature of the water in the aquarium is required. Cold-blooded individuals do not have receptors that would support the body’s thermoregulation. Therefore, when it drops, increases, there is a danger of diseases and a reduction in the life span.

Worried About Water Temperature During Water Changes? Watch This

Favorable regimes for different types of fish in the table

The optimum temperature can be raised during spawning, a constantly high mode usually contributes to a reduction in the life of the fish.

Optimum aquarium temperature

There are no definite numbers that will satisfy every aquarium, as the temperature depends on factors such as its inhabitants, plants and the chosen maintenance regime. The temperature range for most fish is 20 to 30 ° C, however, the optimum temperature should be maintained for each individual type of fish.

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

For catfish, the optimum temperature in the aquarium is in the range from 18 to 28 ° C. However, catfish is an unpretentious fish, therefore it can easily withstand significant deviations from these limits, but for a short time.

The temperature in a scalar aquarium is, in principle, a wide range. The optimum is 22-26 ° C, but they can easily tolerate a drop in temperature and up to 18 ° C, but they need to be lowered gradually, without sudden changes.

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

increase, temperature, water, aquarium

The recommended temperature for a cichlid tank should be between 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 lethal. At the same time, a significant decrease in temperature even to 14 ° C can be tolerated by the fish quite calmly (of course, not for a very long time).

Aquarium water temperature

For all living things, 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 in animals and plants.

How to maintain the temperature in an aquarium?

The water temperature in the aquarium should be kept constant. Its fluctuations during the day are allowed within 2-4 ° С. Sharper changes can be detrimental to the inhabitants of the aquarium.

Everyone knows that the temperature of the water in the aquarium is the same as the temperature in the room. Therefore, when, for any reason, it becomes excessively hot or cold in the room, certain measures should be taken.

During hot seasons, you need to know how to lower the temperature in your aquarium. There are several ways to do this:

  • using a special refrigerator for an aquarium;
  • installation of an air conditioner in the room, which will maintain a certain temperature;
  • application 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 increase the temperature in the aquarium. The simplest heater option 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, since it will not be possible to maintain the water temperature for a long time.

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