For many years, aquaria advised to select compatible types of fish from different groups. These groups had the following names: calm species, temperamental, potentially aggressive, etc. Unfortunately, this technique was often ineffective.
There were other difficult selection systems, but they didn’t make life much easier for aquarium owners. The recommendations presented here are we believe reliable, but still much often depends on character individuals, with what species and in what conditions these fish lived before you bought and much more. Ideally acquire fish kids and grow together, in this case, even relatively incompatible species can get along.
Timid small species
Blue neons (ordinary neons), Fire Tetras (glowing Tetras, Erythrosalonus), Rasbory Heteromorphs, Cardinals, Guppies, Corridors, Glass Perches, Honey Gourami, Ghost Shrimps (glass shrimps). These species are compatible, some of which will feel great in a 60-liter rainforest aquarium. Presented fish are incompatible with most other species.
Peaceful, small species
Danio, Sword, Mollies, as well as larger Tetras, such as Ternetsii, Decorated Tetras, Sickle Neons (Bloody Tetras), Philomena, Black Neons and Copper Tetras. Some of these fish feel great in a tropical 60-100 liter aquarium. These species live collectively. it is better to purchase several fish of each of the selected species.
Active, relatively peaceful species
Barbusses, gourami, macropods, eels and loaches. Sumatran barbs and barley-shaped barbs, as well as blue, gold and marble gourami, lyalius, plus shark balu (black-peaked balantioyloyos), two-colored and green labo. The species presented are moderately aggressive and compatible with each other. Fry grow quickly, and their maintenance will require a tropical aquarium of at least 50l. Adults need an aquarium from 100l.
Territorial relatively peaceful species. Presented views of the New World and Africa. Pelmitochromis, Apistograms, shell Lamprologusy, As a rule, do not exceed 6-8 cm, often brightly colored with interesting behavior, they can be kept with live plants. Aquarium with a large bottom area of 50l for a couple of fish.
Mid-size and large cichlids of the New World
Meek tsilasomas, black-striped tsikhlazomy, black-striped tsikhlazomy albino, diamond tsikhlazomy, ophthalmic tsikhlazomy and other tsikhlida of the New World. extremely aggressive species. However, many aquarists like to watch individuals sort out relationships, protect their territories and take care of fry. As a rule, plexostomus, cuckoo catfish (multi-spotted synodontis), pangasius and adult labo are also getting along with the cichlids of the New World. During the first year of life, a group of these fish will need a tropical river aquarium of at least 100 liters. Adults need an aquarium from 200l.
Aggressive predatory species
Astronotus and other large species. Red astronotus, black astronotus, tiger astronotus, and albino astronotus quickly grow to very large sizes. Astronotus is compatible with large pacu, pangasius, as well as medium and large plecostomus. These fish grow rapidly, initially they need a 300l tropical aquarium. Adults need an aquarium of at least 500l.
Territorial, aggressive species
African cichlids Mbuna: Melanochromis, Psevdotrofeusy, Iodotrofeusy, Labeotrofeusy, Labidochromisy, etc. Mbuna (Mbunas) is a restless group of cichlids living among the rocks along the coast and actively defending their territory. They live in Lake Malawi in East Africa, where they live in heaps of stones and rocks along the coast. Mbuna cichlids are aggressive, they need to be kept in groups of at least 12.15 fish. If the group is smaller, strong individuals will significantly oppress the weak.
A group of a dozen adult fish will need an aquarium with a capacity of at least 300 l with a large number of shelters to isolate family areas. At the same time, cichlids themselves in nature are attacked by large predators and in the aquarium they can be stressful if there are no other inhabitants in the upper layers, which are indicators of calm. Recommended fish for the upper layers: the group of Australian iris: Melanenia three-band, Melanotenia rainbow, Glasslepis. All female cichlids of Lake Malawi are carrying eggs, and at first the fry are in the mouth, the babies often survive, and the strongest can grow in the general aquarium. The cichlids of the Mbuna group are generally indifferent to the aquarium’s care team: Pterigoplicht brocade, Bariancistrus, Ancistrus, as well as to catfish of the Sinodontis type.
Active swimmers, territorial, relatively aggressive species
Malawian cichlids of the Utaka group (Utaka), haplochromis (Cyrtocara) and aulonocaras and other species that live far from the heaps of stones of Lake Malawi, where the more aggressive cichlids of the Mbun group live. These fish are kept in the water column, being in constant motion. In nature, they feed on zooplankton (small crustaceans). Acquire the above species in groups of 12 individuals, otherwise strong fish will oppress the weak. These fish grow quickly, initially they will need an aquarium with a capacity of 300 liters and a length of at least 120 cm. A group of adults needs an aquarium of 500-700 liters. Soma Synodontises get along well with Alunoakar and Haplokhromis, but it’s better not to place the above species with the cichlids of the Mbun group. these species often conflict.
Scalar, lyalius, iris make an excellent compatibility group
These species need an aquarium of at least 150l.
Adults will need an aquarium with a height of at least 50cm (height is required for high-body Angelfish).
Cuckoo catfish (Synodontis) are also compatible with these species.
Piranha. Not compatible with other types of fish. Strict schooling hierarchy. To maintain a flock of two dozen adult fish will require an aquarium of at least 700l. During the hungry period, the weaker individuals of the pack may bite or even eat.
Golden decorative fish. Vualehvosty, Telescopes and Oranda. Voilehvosty, "red hats", etc. need a cold water aquarium.
You can keep a few goldfish in a small aquarium, but with proper feeding and care, they grow quickly, and soon they will need a large aquarium with 40-50 liters of fish.
Koi carp and comets, represented in the next group, are too aggressive in comparison with the fish of this group, therefore it is extremely undesirable to settle them in one territory.
Comets and carps Koi
Koi carps, red, white and red-white comets, as well as shubunkin pond fish. They are incompatible with fish from the group “Golden decorative fish”.
Before purchasing these fish, make sure that you can provide them with an aquarium of the required size!
The groups of fish presented above are just some of the possible options, there are other excellent combinations.
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