Not a difficult characin to breed, although you’ll need to set up a separate tank if you want to raise decent numbers of fry. Something around 18″ x 10″ x 10″ in size is fine. This should be dimly lit and contain clumps of fine-leaved plants such as java moss or spawning mops, to give the fish somewhere to deposit their eggs. Alternatively, you could cover the base of the tank with some kind of mesh. This should be of a large enough grade so that the eggs can fall through it, but small enough so that the adults cannot reach them. The water should be on the soft and acidic side with pH 6.0-7.0, gH 1-5, and a temperature of around 80-84°F. Filtration is not necessary but a small air-powered sponge filter.