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Compatibility of aquarium fish in one aquarium

maintenance, care, compatibility

Compatibility of aquarium fish: tips and tricks

Selection of fish for your aquarium is a very interesting task, but not easy. The choice is truly huge, and we have to take into account not only the features of the appearance of the fish, but also many other factors.

One of them is their compatibility, that is, the ability of different species to live together and feel comfortable in the general aquarium. The main principles of this compatibility will be discussed in this article.

The reasons for the impossibility of sharing some species of fish – and any other living creatures – are intuitively understandable: they live in nature in different climatic zones, in different conditions, and even in the case of close proximity they can be in different relationships with each other, for example, being a predator and the victim. And if we are philosophical about the fact that in the natural environment of the environment some fish eat others, few people want to witness such a picture in their aquarium.

In order to avoid a situation in which fish in an aquarium suffer from their neighborhood, in selecting them you need to know and take into account several basic rules.

Fish species can be:

  • fully compatible;
  • completely incompatible;
  • conditionally (limited) compatible.

Click to enlarge

The first two categories are clear, the third includes species whose coexistence is possible under certain conditions (such as the size of an aquarium, its proper zoning, the presence of shelters, or even particular features of character and life experience of specific fish individuals). I must say that sometimes – very rarely! – in aquariums, somehow, completely incompatible species manage to get along, but these are exceptions.

To facilitate the selection of fish there are species compatibility tables, they are in the special literature and on many aquarium sites. But let us try to formulate the principles by which the compatibility of the fish is determined.

Basic principles of aquarium fish species compatibility

What to do if you really want to populate low-compatible species in an aquarium?

Neons are small freshwater fish of the Kharatsin family. In the wild, they are very active and brisk, able to quickly hide from predators, maneuvering among thick plants.

Body size reaches 3 cm in length, life expectancy depends on water temperature: from 1.5 years to 3 years. Behavioral characteristics: due to a peaceful disposition, they can live together with each other in a flock, as well as with other species of fish. Guppies and neons, petsyli and neons, catfish and neons get along well in the same aquarium.

Such compatibility is beneficial for novice aquarists, since these types of fish will definitely not harm each other.


What else should be considered in compatibility? Males of neons are brighter in color than females, the contrast of scales depends on the species. But one thing unites them – a horizontal strip passes through the body, which glitters with “neon” shimmering even in darkness.

This feature can be attractive to predatory fish and those who do not welcome next to their more beautiful neighbors. So settle a flock of neons of 5-7 fish and more in a spacious tank with shelters so that in case of unforeseen attacks, they can hide in time.

Neons are characterized by calm behavior, and only during the spawning season they become overly active and cocky. Therefore, choose as your neighbors for them fish are not predatory, but omnivorous or herbivorous, balanced and not very playful.

There are a number of rules that are important to ensure that the compatibility of neons with other fish in the aquarium is the most successful.

Look at the successful version of the general aquarium with neons.

  1. Compatibility is possible between fish that live in the wild in a similar environment. Neon fish live in water at a temperature of 18-24 ° C, pH 5.5-7.5 pH, hardness 8-20o. Therefore, their neighbors in the aquarium should be adapted to the same parameters.
  2. Neon cannot be settled with large predators that feed exclusively on meat and carrion. Otherwise, peace-loving neons will become prey for them – the fins can be cut off, at a minimum.
  3. You can not settle in the general aquarium fish large and small, such an incompatibility can cause severe stress, or loss of bright body color.
  4. Choose neighbors, similar in temperament. Small and nimble fish will feel comfortable in the company of calm and not fast fish. What is it for? The fact is that the activity of fish can cause fluctuations in water, which can lead to stress.
  5. Neons are schooling fishes, not loners. They feel well in the company of the same kindred, the fish alone will not live long.

  • A territorial niche should be installed in the aquarium. That is, all types of fish should swim in certain layers of water – in the lower, middle or upper. So they will not interfere with each other. Neons, like somiki corridor, swim in the bottom layer of the aquatic environment.
  • Neons love plants not as a delicacy, but as scenery or shelter, among which you can swim or hide. If other aquarium fish gnaw leaves, or are prone to such sabotage, neons can suffer greatly.
  • During all diseases, the fish must be treated, and the treatment methods may not be the same for all fish. Some tolerate treatment with salt, copper, and others – no. Neons are not particularly sensitive to copper-based drugs. Therefore, their neighbors can become fish with the same portability. Then the treatment can take place in the general aquarium.
  • Neon get on well in the home pond with such aquarium fish: Pecillia (guppies, swordtails, mollies, placiums), speckled catfish, panda, tetra, danio rheo, labo, rastar, minors, gourami, iris, pulcheras, minors, hyacinths, sweaters, laboratories, rasomes, minors, gourami, iris, pulcheras, minors, marines, sweaters, minors, gourami, iris, pulcheras, minors, and fish. Consider compatibility with some fish in more detail.

    See how well the scalar and neons get along in one aquarium.

    Somiki corridor are excellent neighbors for small haracin ones, live together in the bottom layers of the aquarium, and collect remnants of uneaten food. The corridors are innocuous fish, also small and peaceful, they love to watch their neighbors without harming them.

    Rasbory – can make an excellent company neon. Among them: the actual rasbory, boraras, microassemblies and trigonustigma, some of them belong to the family Karpovye.

    Fishes of the Family Petsilievye (guppies, molly, sword-bearers, petsilia) – peacefully cohabit with haracin. Swordtails also have small body size, but males may be excessively active. It should be borne in mind that more than two swordtail males sometimes pursue smaller neighbors, especially during the spawning period.

    With insufficient feeding, in the cramped, small place for swimming, the swordtails become unbearable. So that these fish do not terrorize small neons, the aquarium should be spacious, with a sufficient number of plants and shelters.


    Neons are poorly compatible with such fish:

    1. Large catfish, cichlids, barbs, astronotus, cockerels, koi carps – those who live in cool water, or have a predatory, aggressive behavior.
    2. Goldfish – they live in cool water, and are aggressive towards bright fish and their offspring.
    3. Angelfish – can live with neons only under the condition that they all grew up with the age of young animals. But neon-stranger scalar will be perceived as food. Also during the mating season, the scalar will be aggressively inclined towards everyone, including these small fish.

    Aquarium gouras can live with other fish even better than with their closest congeners. Compatibility is possible with peaceful small fish that will swim in the middle and lower layers of water.

    There are also a number of representatives of the underwater world, with whom the gurus easily get along. Compatibility is possible with neons, iris, danios, battles, swordtails, tetras, catfish, minors.

    Representatives of the families of cichlids and scalar also get along with gourami.

    It is not recommended to settle with large predators, with fast and active fish, playful. This applies to species that can pluck fins and constantly interfere, among them: barbs, cichlids, roosters, parrots fish, astronotus, goldfish.

    Compatibility is not possible with discus, shrimp, guppy, since there will be a confrontation between them, or some will be eaten by others.


    The following factors may cause conflicts between gouras and unrelated fish species:

    • Bright color or long, fluffy fins that attract caring neighbors. They can tear off the fins, or destroy the “handsome”;
    • Disproportionate fish need space for swimming and life, if some fish swim at the upper layers, others at the bottom, this does not lead to collisions;
    • Insufficient aquarium volume and lack of personal swimming space, insufficient number of plants and shelters;
    • The main cause of conflict is the appearance of superiority in size, large aquarium fish immediately notice small fish, perceiving them for food.

    Look at the aquarium with gourami, scalar and speckled catfish.

    To understand whether compatibility between species is possible, it is necessary to become familiar with the criteria of full, partial compatibility and incompatibility. With full compatibility, you can safely observe the life of fish, with partial threats of rivalry, in the absence of compatibility as such, fish do not need to be placed in one aquarium at all.

    Couples gourami and fish compatibility:

    • Angelfish and gourami: fully compatible
    • Barbus: partially compatible
    • Petushki: incompatible
    • African cichlids: incompatible
    • South American cichlids: incompatible
    • Corridors: fully compatible
    • Danio: fully compatible
    • Discusses: partially compatible
    • Lost: Partially compatible
    • Goldfish: incompatible
    • Gourami: partially
    • Guppy: Partially
    • Koi carps: incompatible
    • Botsii: fully
    • Mollies: fully
    • Astronotus: incompatible
    • Percylia: fully
    • Plekostomusy: fully
    • The iris: fully
    • Rasbory: fully
    • Labeo: completely
    • Swordsmen: fully
    • Tetras: fully
    • Acne: Partial
    • Piranhas are incompatible
    • Shrimp: incompatible
    • Floating aquarium plants: fully

    See also: How to care for chocolate gouras?

    Very often, beautiful decorative goldfish are the very first pet beginner aquarists. But before you start them at home, you should definitely consider the compatibility of these beauties with other typical inhabitants of aquariums.

    Practice shows that such a neighborhood is impossible. And this is due to the natural aggressiveness of almost all tsikhlovyh.

    Even if cichlids are herbivores of the same size as goldfish, then races around the aquarium are inevitable.

    In some sources you can find information about the peaceful living in the general aquarium of goldfish and South American tsihlazom, however, clashes between them are inevitable. Especially if the fish are hungry.

    As for the fairly common astronotus, he considers the “gold” only as an additional dish for his dinner.

    Barbs growing in length of 10-12 cm are classified as large species. Among them: arulius, Everett, red-cheeked barb, African barbs. Compatibility in the general aquarium is possible with cichlids, freshwater sharks and catfish.

    Medium and small barbs reach a length of 5-6 cm in the aquarium. These include Sumatran, five-lane, green, ruled, oligolepis barb.

    They are united by a cheerful disposition and a high level of activity in the water, so they are recommended for breeding in glass tanks. Get on with other fish of similar size, but not with slow. Snooty character – fish with long and veiled fins pluck, depriving those of a beautiful appearance.

    For them it is better to choose a spacious rectangular aquarium, where there will be enough space for swimming. Shelters are also important – stones, snags and plants, but in a certain amount – they are not needed much for schooling fish.

    6-7 fish should be acquired immediately to avoid stress and conflict situations.

    Look at the aquarium with Sumatran barbs in the company with scalar scalar and ordinary.

    A signal of unfavorable conditions in an aquarium may indicate a strange position of the fish – when they do not lie at an angle of 45 degrees head down (as during rest), but at a greater angle.

    Quickly swim in the pond, are constantly in motion, play among themselves, catch up with each other. They live not very peacefully, they will compete with even aggressive species of fish.

    Therefore, it is necessary to carefully and carefully choose their neighbors.

    A typical question for aquarists who are going to keep Poecilia reticulata (Guppy) in the general aquarium is: “Which fish get along with guppies?”. It is important to avoid settling with predatory fish, such as the red-tailed shark, Sumatran barbs, scalars, large cichlids, eels, and mastembela.

    The best aquarium neighbors for small viviparous fishes (3-7 cm) are small fish with a peaceful nature.


    Fish that are suitable for settlement with Poecilia reticulata

    There are a large number of freshwater aquarium fish that can live with guppies in peace and harmony. The listed types are the safest options.

    They mate with these viviparous Pecillians in terms of similarity of living conditions and behavioral characteristics.

    Somiki corridor – relatively slow swimmers, almost always in the lower layers of the aquarium. They are characterized by small body size and calm disposition, they gradually clean the aquarium from food debris. Guppies swim in the upper and middle layers of the water, so the corridors will not hook them.

    However, one should not add salt to the water in which catfish live (and the pets-liqueras love such water), otherwise they will die.

    See how guppies and catfish corridor dwell in the same aquarium.

    Indian glass fish, or Malaysian glass – it is often confused with glass catfish, but they are completely different species. The glass is a peaceful and rather hardy fish, they are excellent companions for guppies and other small tropical fish.

    The transparent body of the body makes them unique, they even shine through the skeleton and internal organs. Malaysian glass is characterized by gregarious behavior, swims in a group of 5-7 fish. It is not recommended to buy fish with a fluorescent color.

    Just “painted” glass fish are more sensitive to the parameters of the aquatic environment, and during the disease color pigment can open wounds, causing infection in the water.

    Mollies, patcilia, swordtails – viviparous fish of the Family Petsilievye, which are best compatible with guppies. All fish are related species, in the general aquarium they can breed, bringing hybrid offspring. Guppies, mollies and platies will not conflict with each other.

    But the swordtails, especially adult males, can terrorize the tail fish, so it is better to settle with “swords” fish with short fins. Mollies prefer to live in a pair.

    If in a spacious aquarium will live a couple of moles and a few guppies, you get a great neighborhood.

    Neon tetra – the most popular freshwater and tropical fish. You can keep with any peaceful species of fish, it was even called “pearls of the aquarium.” Neon tetras are characterized by a rosy blue body with a reddish tinge.

    They create a strong flock of 6-10 individuals, and calmly swim in the upper and middle layers of water. Can make an excellent company viviparous fish, without disturbing them.

    Rasbory – differ in metallic color scales, they are clearly visible, which simplifies the care of these fish. Hardy, peace-loving, swim in a flock of 6-8 fish.

    They can be settled with guppies in the general aquarium, as their characters are perfectly compatible.

    Dwarf loaches – like all loaches, they are very peaceful fishes. However, some types of char can grow larger in size compared to guppies. Dwarf loaches remain small all their life, rarely grow to a length of more than 5 cm, so that they are commensurate with petilia fish.

    They like to swim in a flock, so settle them immediately with a flock of 3 individuals. You can build a few shelters in the aquarium, add live plants, because these loaches like to hide and rest.

    Endler Guppy (lat. Poecilia wingei) – used to believe that Endler’s viviparous fish are relatives of Poecilia reticulata.

    Later it turned out that these are different species, although both come from Central America. There are certain similarities between species; they can interbreed in the same aquarium.

    Viviparous endlers are suitable for tropical aquariums, where different viviparous petsilievy live. It should be borne in mind that the Endler fish grows up to 3.8 cm in length, therefore it cannot be accommodated with larger species.

    Settle them immediately for 6-8 individuals and more, create shelters for them, otherwise they will be eaten. Poecilia reticulata will ignore them, but under proper conditions of detention.

    Observe laliusi, neons, catfish and guppies in the general aquarium.

    General rules for compatibility with guppies in home aquarium conditions

    When choosing a fish for a community with guppies in an aquarium, you need to know some general rules that you should follow:

    1. In the tank you can keep the fish only with a similar temperament and behavior. Males guppies usually have long and lush fins, so those neighbors who can pluck them should not live with them. Guppy is not compatible with aggressive, fast types, otherwise stress and physical exhaustion of victims cannot be avoided.
    2. Diet and water requirements – be sure to choose fish that prefer the same food and water conditions as guppies. Check the pH, hardness, temperature of the water environment.

    1. It is better to keep all the fish in a spacious tank with enough space for swimming and shelter. On one fish should go on average 50 liters of water.
    2. The proportionality of the fish – Poecilia reticulata are considered small fish, so it is desirable to keep them with the same neighbors. Large “comrades” will be seduced by the size of defenseless guppies, they can eat them, or take food from them.
    3. Small bottom fish species can be kept with viviparous Guppy, which rarely swim to the bottom.

    Parrot fish, or red parrot (Red Parrot) – a representative of the Cichlow family. It is a hybrid of aquarium fish, which appeared as a result of selection of two representatives of Cichlids.

    In 1991, the fish became the property of the first aquariums. Its production has increased, with time it received the name “red parrot”.

    The history of creating a hybrid carefully classified, however, this applies to many fish, artificially bred. There is a version that the Red Parrot is a descendant of several South American Cichlovas, as a result of triple crossing. Asian breeders strictly protect the right to the maintenance of this fish.

    The red parrot can interbreed and bring offspring, but very few people managed to see their eggs.

    Aquarium parrot fish has an unusual body color. Thanks to him, she is popular among breeders and lovers.

    All the pet shops and aquariums in the world do not deny themselves the pleasure of settling this wonderful creature. In Russia, a red parrot appeared in the 90s of the twentieth century.

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