Redeye tetra (Moenkhausia sanctaefilomenae) once was the most spread and common tetras in a tank. A school of these characins can make any tank look nice and lively, but nowadays the fish has yielded the palm to other fishes.
Is a peaceful active fish, quite easy in care. This fish needs to be in the school much more unlike it’s relative redeye tetra. Regardless of how many of them are in a tank: three, eight or twenty species – they always swim in a school.
Congo tetra (Phenacogrammus interruptus) is a timid, but unspeakably beautiful aquarium fish. Probably, it is the most gorgeous fish of the characin family.
A tank, which has tetra fishes in it, should be thickly planted. The majority of these fishes has a very good looking coloring (due to some special pigments they have, that change their color under different kinds of lights).
The fishes look good in a school. To create the space in a tank so, that the whole fish school is seen and not hidden among the tank plants, it’s necessary to put them thickly almost without any space between the plants.
Therefore, some free space is left around the front tank wall and there the school can swim.
Gymnocorymbus ternetzi — is a kind of freshwater fishes of the Characidae family. It inhabits in the rivers of Mato Grosso, Paraguay and Rio-Negro. This kind of fish has easily adapted to aquarium conditions, it breeds easily and has a numerous offspring.
However, this fish may start nipping other fishes fins, so it’s not a good idea to keep it in a tank with veiled kinds of fishes or with long-finned ones.
A model fish species when scientists created glofish tetra.
A tank fish called emperor tetra (Nematobrycon palmeri) feels itself rather comfortable in community tanks and thickly planted ones desirably.
Emperor tetra breeding can even occur there, especially if the fish are kept in a small school. It’s good if there are more than 6 fish in a school, since otherwise they may nip other fishes fins.
Therefore keeping tetras in a school significantly smooths such a behavior and switches them to dealing with species of their kind.
