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Small aquarium on the table

maintenance, care, compatibility

A small aquarium is a tank with parameters of 20×40 cm and less (a nano aquarium) in which small ornamental fish can be placed. The volume of such containers can be from 10 to 20 cubic liters, so they are suitable for the installation of decorations and equipment.

In a small aquarium you need to put lighting, plant plants, decor, do not forget about the filter and compressor. That is, a small aquarium should not differ in functionality from a spacious one.


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.

As for the maintenance of the aquarium of small size, here you can get under the influence of stereotypes. Often, parents buy aquariums for their children, considering that a small aquarium is easier to clean than a large one. Rather, the “underwater world” of small size is subject to temperature changes and requires frequent water changes.

If water is rarely changed, the waste products of fish begin to accumulate on the walls and it will be rather difficult to clean the container with your hands. In addition, the slightest excess feed, stale at the bottom of such an aquarium, instantly spoils the water and shifts the biological equilibrium.

But if you decide to start a small aquarium, get it “fully loaded.” Specialists will select all the necessary equipment for lighting, water filtration and water heating. And, despite the equipment, place the aquarium in a room whose temperature is constant.

With such a small amount of water, a drop of even 1-2 degrees negatively affects the fish. When feeding fish, give off a small amount of food so that after feeding there will be no leftovers.

Remove excess feed immediately.

When caring for an aquarium, you will have to carry out frequent water changes, until the bacteria stabilize their numbers in the filter. Bacteria convert waste decomposition products into safe substances.

A stock of settled water should always be at your disposal. Water in the aquarium should be changed every three to four days, replacing at least a quarter of the volume of water in a small aquarium.

To prevent algae, an aquarium should not be placed close to the window. Direct sunlight should not fall on it, and the duration of the active daylight should be smoothly increased from six hours immediately after the arrangement of the aquarium to ten hours by the time the biological equilibrium is stabilized.

Separately, I would like to mention this model as a small round aquarium. This kind of aquariums can not be considered successful:

  • first, curved glass has the effect of a lens and distorts the outlines of fish,
  • secondly, the fish themselves see the world in a similar aquarium blurry (many aquarists are sure that this negatively affects their health),
  • thirdly, to clean the rounded glass is difficult, the standard scraper is not suitable for this procedure.

Creating and maintaining biological balance – the optimal ratio of plants, decor and fish for a small aquarium is quite a laborious job. Residents of the aquarium should feel comfortable in a small space.

To do this, do not overload the small aquarium inhabitants.

Fish for a small aquarium is chosen depending on their size and nature. Small fish with a calm, peaceful nature are preferable.

You can combine several species of fish with the same content requirements or create ideal conditions for one breed.

Guppies, small golden and cherry barbs, gourami, glowing tetras are fish for a small aquarium. The aquarium looks good with one goldfish or a cockerel.

Also in such a reservoir, you can settle danios or neons.

Keep track of the size of your pets. With good care, the fish grow in a small aquarium, and it becomes crowded.

Catch large fish in large domestic reservoirs and replace them with young.

There are many forms of a small aquarium: a cube, a glass, a trapezium, hexagons, etc. The smallest aquarium in the world, for example, has a rectangular shape, which only emphasizes its uniqueness.

If you still choose a small round aquarium, remember that externally round and rectangular aquariums may seem the same size, but the round aquarium always has a smaller volume. Choose decorative elements for a small round aquarium according to its volume, small snags and stones, which can also be used as a foundation for fastening plants.

For decoration of small aquariums, most often use moss (small pieces) or Hemianthus, and from plants – Anublas, Microsorum and Vesicularia.

In the case of small aquariums, a good solution would be to completely abandon the fish and populate the pond with shrimp. The aquarium with young ampouleries will also look impressive.

A mini-aquarium, like a spark in the dark, will illuminate your apartment with natural peace and beauty.

Not every person can afford to buy and place a large aquarium at home. Sometimes there is simply not enough free space, and one wants to decorate the interior of the dwelling and have this kind of pets at home. Often there are cases when small aquariums are purchased in order to put them in their workplace, thus decorating the office.

But it is important to remember that a small aquarium is very difficult to maintain. The difficulty is to properly maintain a sustainable biological system.

Not every novice aquarist will be able to choose the right fish for a small aquarium.

Characteristics of a small aquarium

Experts advise not to buy very small vessels. The fact is that in small aquariums it is simply impossible to maintain the parameters that are necessary for the life of the fish. For example, for keeping fish in a small aquarium, you need to maintain a stable temperature regime.

There are fish that need the temperature in the aquarium to reach 18-20 degrees, and there are tropical species that require temperatures above 25-27 degrees.

At home, it is very difficult to maintain a stable high temperature of the water in the aquarium. At the same time, the water temperature remains one of the most important parameters for keeping fish.

In addition, as long as the bacteria do not settle the filter, the aquarist will have to frequently change the water. For replacement water is suitable, which

defended for at least two days.

Selection of equipment and plants for a small aquarium

Aquariums with a small volume are sold in specialized stores. The kit usually sells a cap, an air pump, a filter, and a light. That’s all it takes.

Usually such kits are not expensive.

The choice of plants in a small aquarium directly depends on the size of the aquarium. Large and fast-growing plants in the design of small aquariums should be avoided.

They will occupy the entire volume and will cause a lot of trouble.

For small aquariums, small species of Anubias and microzoriums are ideal. The advantage of these plants is that they do not need to be buried in the ground, but only easily attached with wire to the pebbles at the bottom.

Successfully will look and cryptocorynes. You can use different mosses for decoration.

Especially advantageous they will look in an aquarium with shrimp.

Selection of aquarium fish for a small aquarium

From viviparous fish for a small aquarium, you can choose guppies. This is a common and inexpensive fish.

You can purchase red, spotted, black or green swordtails. As an option – to get placium or mollies.

These relatively unpretentious fish for a small aquarium, there are different colors.

You can choose barbs or danios or have catfish ancytrus from the fledgling fish.

Often for the design of the workplace choose round aquariums. When choosing fish for a round aquarium usually stop at certain species.

Often you can see a goldfish in a small aquarium. Sometimes in mini-aquariums they keep frogs, tritons, shrimps.

A betta fighting fish in a small aquarium will also feel great, as it can breathe atmospheric air. This feature explains the choice of this type of fish for small round aquariums.

It can be concluded that when choosing fish for a small aquarium, many factors must be taken into account, but mini-aquariums are worth the effort, as they will be a great addition to the interior.

The most unpretentious and small aquarium fish with photos

I think many aquarium fish experts will agree that the first place is given to guppes.

Everyone probably knows these fish … even those who have never seen aquariums. We can say that these fish are the fish of all children of the former USSR (they were in all Soviet aquariums))). The fish is very beautiful and unpretentious.

The tail fin is her beauty. The simplicity of the fish is that it can withstand “difficult conditions of detention.” I happened to see an aquarium with guppies. without aeration, without filtering, without plants, without proper feeding etc. – horror, terrible dream aquarist.

Nevertheless, guppies managed not only to survive in such an aquarium, but even tried to multiply. So to mock the fish of course not worth it.

But their endurance and vitality sometimes affects.

GUPPI – THIS IS A SYMBIOSIS: BEAUTY, INSENSITIVENESS AND EASY + SUPPLEMENTS REPLACE ARE “LIKE A KROL” INDEPENDENTLY – YOU WILL ALWAYS BE UPDATED OF “AQUARIUM PAINTS” Read about the GUPPI read more

2nd place Swordtails

A very famous fish, as a result of persistent selection, a large number of swordtails of various colors and shapes were bred. Males differ from females by the presence of a “sword” on the lower edge of the caudal fin.

Swordtails are kept in flocks in a densely planted aquarium. The minimum size of the aquarium from 10 liters (but better is more).

A good volume of aquarium for a small group of swordtails is 50 liters.

An interesting fact about these fish is that the female swordtail can, at some point, become a male, i.e. change the floor. This is due to the struggle for the survival of the species.

HOW AND GUPPI ARE RECOMMENDED, ALL THOSE WHO DO NOT WANT TO DEAD WITH THE AQUARIUM.

Read about swordsmen more in detail here.

3rd place Somiki corridors

It should begin with the fact that all aquarium catfish – a priori unpretentious. Moreover, they are “orderlies of the aquarium world”: they clean the soil and eat the remnants of life activity. The corridors are chosen from all catfish, since

in addition to the gill, they have intestinal respiration, those. if aeration stops, they will live for a long time.

The fish are very peaceful, calm. They slowly swim along the bottom in search of food. In the aquarium they are usually kept in flocks.

Fish, do not pose any threat to other inhabitants of the aquarium.

You can read more about CORRIDORATUS here.

4th place Mollies

Molly, like guppies – viviparous fishes. Unpretentious and tolerant of poor conditions.

Nevertheless, they are more capricious than the “troika of winners”.

Fish suitable for beginners and young aquarists. The fishes most difficult to keep from all members of the family are demanding of their conditions, they do not tolerate low temperatures, some like “salty” water, like bright light, etc.

You can read more about MOLLINESIA here.

5th place Tetras – Harazinki

All tetras are small, brisk, not capricious fishes. However, they will not be able to survive in “Spartan conditions” as guppies.

They need aeration and filtration. You can keep them in an aquarium by a group (from 5 individuals) with a volume of at least 35 liters of water.

You can read more about TETRAH here.

6th place Ternetsii

Very famous little fish. Fish energetic, mobile. Fish get along well with other types of fish.

Somehow my terntions even lived with small cichlids. Recommended aquarium with a volume of at least 30 liters of water, densely planted with plants.

Aeration, filtration – yes!

You can read more about TERNIA here.

7th place Danio (rerio, pink)

Starting from the 5th place TOP, all the fish require unpretentious attention. Tanks are different from them – briskness and speed of movement.

They can coexist with many species of fish, even with fish of medium and increased aggression: scalar, goura and even with small cichlids.

Read more about DANIO here.

8th place Torakatum

One of the famous large catfish of the aquarium world and excellent attendants of the aquarium. Peaceable and unpretentious to the content.

They can be kept in a common aquarium with thickets of plants and a large number of shelters. Fish, do not pose any threat to other inhabitants of the aquarium.

Compatible with all kinds of fish. The neighbors are not recommended only one hundred percent aggressors and predators.

You can read more about TORAKATUM here.

9th place Gourami

Gourami – are medium sized fish. Entered in this TOP due to gill labyrinth – fish do not need aeration, they breathe atmospheric air.

Really peaceful fish, but sometimes aggression. Some individuals taken separately are even very aggressive, as they say, as lucky.

You can read more about GURAMs here.

10 place Barbus

Barbusses are schooling, small fish that can stand up for themselves! If you decide to start a barbus, I recommend to allocate for this a separate aquarium, “barbusyatnik.”

“Pirate” temper, the ability to stand up for themselves – deserve 10th place. You can read more about BARBUSH here.

Of course, the above TOP is conditional – always remember the words

Antoine Marie Jean-Baptiste Roger de Saint-Exupery

“We are responsible for those who have tamed”

We also recommend you to see the colorful brochure. Popular types of aquarium fish. This brochure contains all the popular types of fish, with a description of their conditions of maintenance, compatibility, feeding + photos.

(to view or download, click on the image)

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