They are very easy. I had some long time ago and they even lay eggs and breed in my aquarium, but is not my favourite kind of fish for a community aquarium. Having evolved in clean and rapid rivers in India they are fast and nervous. Always darting and ready to engulf any food scrap. Can be a real source of stress for the other tank inhabitants and also for the owner (all you see most of the time is a blur when you try to observe your fishes).

I wonder how they can pick up a male and two females in a larvae pool. The sexual dimorfism on young zebrafishes is close to inexistent.

I had breeded fishes more transparent that those larvae, but must admit that the macrophage video is very cool.