Tetra Fish Reproduction. You keep them in a tank that does not contain any ammonia and nitrites. They will usually spawn their eggs in the morning, so if you want to watch them spawning, just stay around the breeding tank after the lights turn on.
Being descended from the caracid family they are very easy to breed, however before laying a large aquarium is. If you didn’t notice neon tetras breeding, adjust the condition inside the tank If the fish are engaged in courting (or even spawning) in the community tank, then they are ready to breed in the spawning tank also.