Breeding Egg-Scattering Tropical Fishes
Egg-scattering tropical fishes like tetras, barbs, and danios, should be bred in spawning tanks where the eggs can be safe from predation.
Tetras, barbs, and danios, some of the more popular schooling fishes that aquarium hobbyists include in their community tanks, are known as egg-scatterers, which means that they do not build nests, or prepare a specific spot for spawning.
Egg-scatterers will freely breed in a community tank, but most of their eggs and the very small and fragile young will not survive to mature in the presence of the adult tank inhabitants.
Egg-scatterers are also “bad parents” who do not perform any type of parental care for the eggs and the young. Therefore, for better success in breeding these species of tropical fishes, transfer the breeding set (two females to a male to prevent excessive harassment of the female) to a spawning tank.
The breeding tank should be lined with a substrate of marbles, java moss, or some type of mesh where eggs can settle out of the reach of their parents. Fine-leaved plants can also be used for spawning tetras that tend to shimmy and scatter their adhesive eggs and milt onto the vegetation.
Barbs usually spawn hundreds of eggs, while tetra broods are often small in number. But in both cases, the adults should be removed before they get a chance to prey on their own eggs and young ones.
Remember that tetras, barbs and danios require the best water quality, especially in their breeding tank. Research on their specific environmental requirements for best results.
A day after the fry hatch, feed them with plenty of infusoria, newly hatched brine shrimp or other fine powdered fry food. A varied diet is always best for proper nutrition and ideal growth.