When I had a breeding pair, they spawned many times. They like very clean, warm water high 80s, at an inch the young would start killing each other. The only way I was able to keep them from stressing each other into bloat is to keep them separated, each an individual compartment.
I met a little dream. Today I brought a rarity in Slovakia - Nandopsis haitiensis. Finally I managed to get it. I hope to survive to adulthood. Currently I have them in a separate tank. Later, when they grow up they brought up to 1350 liter tank.
If I can advise: you have to keep them at least 80-86s F.
Here is a photo of my juveline:
Sorry for the translation. Translated from: Translate.google.com