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What kind of fish can be kept in a round aquarium

maintenance, care, compatibility

Round aquarium – features of care and maintenance of fish

Among amateur aquarists popular round aquarium. It is easy to install, does not take up much space and effectively fits into any interior. But since living creatures live in an aquarium, it is necessary to think about their proper maintenance and care.

A round aquarium has some specific features and requires the right approach.

On the shelves of pet stores located a wide range of aquariums, including round, of a different displacement: from 5 to 40-50 liters or more. An aquarium round 5 liters is essentially a large glass jar, which will not be a comfortable dwelling, but a prison for fish.

It is almost impossible to equip it with even the minimum necessary equipment – a filter and a compressor. Five-liter capacity can be used except for jigging fry.

A round aquarium of 20 liters or more is already a suitable option for keeping fish. In this volume, you can install enough equipment, settle a few fish and make their existence comfortable and as safe as possible for health.

To keep the water clean, a compact gravel bottom filter is placed in a round aquarium. The principle of such a filter: the pump drives a layer of water through it, the dirt is trapped by gravel – a filtering material.

The logical pattern is that the larger the volume of the aquarium, the more powerful the pump must be, the more expensive the filter. On the volume of 10 liters fit a filter with a minimally powerful pump.

If you are greedy and do not install a filter, you will have to change the water every day, which is very stressful for the fish and ultimately ruin them.

In a round aquarium, the surface area is relatively small, which leads to an oxygen deficiency. Satisfy the water with vital air special compressor.

Buy need to mark “for round aquariums.” The principle of choice is the same as for the filters – the larger the volume of the aquarium, the more powerful and expensive the compressor.

For a capacity of 20-40 liters suitable compressor with a minimum capacity.

Lighting is necessary not only for fish, but also for green algae. Thanks to the light, photosynthesis occurs in their leaves, which enriches water with oxygen. It is better to place the lamp from above not closely in the glass, so that it does not burst.

It is best to use ordinary incandescent bulbs, because their spectrum is as close as possible to the sun. In this case, the optimum brightness is set at the rate of 1-2 watts per 1 liter of water.

It is advisable to buy a round illuminated aquariums in the kit.

Everything is not so difficult, and even a novice amateur can competently equip a round aquarium.

To resemble an aquarium underwater world, all installed equipment must be masked:

  • Lay on the bottom of the soil height of 4-5 cm, which will cover the filter. For soil in a round aquarium, it is better to use gravel or small dark pebbles;
  • plant 2-3 living plants in the ground;
  • put the intestine from the aerator (compressor) into a bamboo hollow tube, from which air bubbles will float nicely;
  • unfortunately, the limited bottom area will not allow to decorate a round aquarium with the wreckage of a ship or the ruins of a castle. But here any house or a shell fits perfectly. This is aesthetically pleasing, and the fish in the shelter feel protected.

What fish are suitable for keeping in a round aquarium

The round shape limits the movement of fish, in addition, the specific refraction of light creates the effect of a lens. All this negatively affects the health of the fish.

Nervous, weak individuals cannot survive in such harsh conditions. Therefore, to round the aquarium please the eye, you need to carefully approach the issue of choice of guests.

It is necessary to populate a round aquarium with small non-secret fish in limited quantities. Overpopulation will immediately affect the health of residents.

The roosters, lalius, catfish (they are also useful because they clean the walls of the aquarium), guppies, goldfish, small gourami, antsistrusy, swordtails, petilia, molynesia, neons, freshwater shrimps and decorative snails are well acclimatized in the round aquarium.

It is better to feed the fish in a round aquarium with dry food in small portions so that the fish eat it immediately without any residue. Otherwise, excess feed will clog at the bottom and pollute the water.

A round aquarium can be a significant part of the interior room. Quite a lot of aquarists admitted that they acquired a round flask so that a luxurious goldfish floated in it.

Of course, in reality, the aquarium turned out quite different. The idea did not appear because of the love of nature, but from the search for a spectacular interior solution.

The location of a round aquarium in a room involves the choice of an open space: on a table, on a separate stand, or mounted on a wall. A semicircular aquarium can also be fixed on the wall. The shape of the tank gives the underwater world an interesting look.

From different angles of view, aquatic inhabitants and vegetation will look different.

Making a round aquarium requires a special approach. Aquarium is not only an interior object. Its main function is to create conditions for the life of aquatic creatures.

Therefore, it is necessary to purchase special equipment for a round aquarium. Without it, the fish will not survive.

It is necessary to place a compressor, heater, filter in the flask, to provide lighting. Conventional devices will not work, they will be too allocated in the water space.

When buying, you should choose models with the indication “for a round aquarium”. The shape and dimensions allow them to be placed neatly so as to spoil the appearance least of all.

Pebbles are scattered at the bottom and plants are rooted in them. Equipment for a round aquarium is hidden by plant shoots.

It is advisable to choose such aquatic plants so that they do not hide the main inhabitants with their bizarre appearance. And pay special attention to the shape and size of the stones. Remember, in a round aquarium, all the details look more prominent.

Therefore, any defect is immediately noticeable.

The specific shape and small volume do not allow creating thematic landscapes with large-scale decoration in the form of fragments of a ship or ruins of a castle. However, when designing a round aquarium, you can use other design techniques.

For example, among the stones you can place a miniature model of a chest from a pirate ship. Or lay out a few fragments of ethnic pottery.

The main principle on which the decor of the aquarium space of this form is based is minimalism. Otherwise, for all the elements you will not be able to see the underwater inhabitants.

The lid for a round aquarium performs several functions: it prevents fish from jumping out, getting into unusual objects, protects animals from children and cats, and also serves as a place for fixing the lights. Therefore, it is better to purchase an aquarium immediately with a lid than to search for the desired model. The cover for a round aquarium can be purchased only in specialized stores.

It is more difficult to find a cover only for a semicircular aquarium.

In a round container, light is refracted peculiar. According to the widespread opinion among aquarists, not all fish are able to survive in such conditions. Firstly, living beings may experience stress due to distortions of the surrounding reality, and secondly, it shortens the lifespan for nerve fish.

Although the main limiter is the amount of space. Fish for a round aquarium fit only small size. Be sure to put here a little catfish, so that it clears the glass from green scurf.

Neons, males, and lilies will feel great in the water. Small-sized goldfish grow badly and often get sick.

The number of small fish should be maintained at the same level. Before you run neons here, you must make calculations: the number is determined by the volume of the aquarium. Overpopulation will immediately affect the health of the fish and the general appearance of the artificial reservoir.

The power of equipment for the aquarium is selected in accordance with the requests of a particular group of fish.

It is better if the fish for a round aquarium will be bright, visible. For example, some species of guppy.

Cleaning a round aquarium has its own specifics. Since its volume is low, about 20% of water should be replaced every week.

The water is poured or filtered.

Particular attention – cleaning glasses. Experienced aquarists are advised to plant inside the animal that eats algae: catfish, snails.

Glass bending does not allow the use of ordinary brushes. Therefore, craftsmen have adapted to clean up the raid with a piece of women’s nylon pantyhose.

To remove fish excrement, it is necessary to use a siphon, about once every two months. In a round aquarium, the bottom shape eliminates the creation of “dead zones”, so the garbage is removed especially well. Part of it accumulates in the biofilter, and the rest
removed by siphon.

Care of a small aquarium, on the one hand, easy, and on the other, takes the hassle. Choose a mini tank rectangular, with straight and smooth walls. It is convenient to clean them with a scraper, to maintain.

If the tank is round, then it will be inconvenient to reach its corners, it is difficult to wash. A 10-liter aquarium pollutes faster than a 50-100-liter aquarium.

Water changes will have to be done more often, as well as comprehensive cleaning, which is not useful for the biobalance of the aquatic environment and the health of the fish.

The main disadvantage of mini tanks is a small amount of water. It does not fit a lot of fish. There you can settle 1-2 fish, and no more.

In a large aquarium, water changes are not strongly felt, in a small one this is a great stress. Any changes in the biological balance: fish death, overfeeding, pollution immediately affect the aquatic environment.

The only thing that can be done is to adjust the water parameters in time, feed the fish gently, clean the bottom.

See how the ground siphon in the nano aquarium.

To care for a small aquarium should be the same as for a large one. Once a week you need to change 10-15% of water, if necessary. So that the fish do not have stress, do not replace the water completely, try to add it in small portions.

The ideal aquarium filter for such a tank is a pump with an internal sponge. The sponge cannot be washed out under running water, otherwise all beneficial bacteria participating in the nitrogen cycle will die.

If you choose the smallest reservoir, then it will be almost impossible to install plants and decorations. Some skillfully planted even in 3-liter jars of dwarf plants, but it is inconvenient to take care of them.

In the 10-liter tank there is the possibility to hold a dwarf anubias, a dwarf arrowhead, an echinodorus “dwarf amazon”, a dwarf cryptocoryne. Plants for a small aquarium are able to control the level of nitrite, nitrate and ammonia, create shelters for fish.

Make sure that the aquarium was the ground. Choose a substrate treated, clean, without paint.

Remember that using a regular scraper to clean aquariums of minimal size is very difficult from the layer of plaque.


Now about feeding. As you know, overfeeding harms not only the health of the fish, but also adversely affects the quality of water. All uneaten decays, turning into harmful impurities and bacteria.

Decay products are deposited on the bottom and reservoir machines, disturbing the stability of the biological environment. Fish should be fed, hunger is also not an option. Once a week, arrange fasting days for fish.

Add food to 4-6 grains, which pet is swallowed by force. What is not eaten, you need to remove the gauze net.

Let’s for fish that live in a small 10-20-liter nursery as much feed as they eat in 2-6 minutes. Flakes, live food, sinking granules fit. They sink slowly and do not pollute the environment.

If you live on bottom catfish, they will eat everything on their own. Fish can be fed to their usual high-grade food, without disturbing the diet.

It is important to clean everything in time.

See how to make a small aquarium.

What kind of fish can you keep in mini aquariums? In a small 10-20 liter tank you need to settle pets with miniature body size. Fish 2-6 centimeters in length will carry such a volume of water.

But remember that even small fish want to swim in a spacious environment. They can not be kept in containers that will restrict movement.

Territorial and aggressive fish cannot be accommodated in mini aquariums. Which do not need to settle in a 10-liter aquariums?

These are swordtails, barbus averages, cichlids, gourami, danios. They have an active and energetic disposition, they need more space for shelter.


In the aquarium of 10-20 liters, you can settle small barbs, pseudomogil gertrudy, rice fish, cherry barbus, rasbor, erythrosalonus, neon, tetra Amanda. Also there you can keep such fish and shrimp: catfish ottsinklyus, corridor, shrimp amano, cherry shrimp, copper tetra.

A representative of the genus Pecilia, viviparous fishes get along well in mini tanks.

You need to buy breeds of fish with a strong immunity, that is, not actually thoroughbred, but hybrids. If you do not have the opportunity to buy a spacious “house” for your small pet, you need to buy a small aquarium with a capacity of 10 liters.

There are also often settled well-known Siamese cockerels. The cockerel can live alone, does not get along with relatives, this is after all a fighting fish.

See also: Small aquarium fish.

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