I had a breeding colony of 24 several years back. They were in a species-only 55 with lots of piled rock/rubble. I never saw any actual spawning or nests but, I've had fry swimming around many times. They fed on live and frozen (naupli, cyclops, etc). I kept live scuds in the tank which, I'm sure, juvies became additional food for the fish. Filtration was 2 40gal sponge filters (since I didn't want food and fry pulled from the tank). This was a comical tank to watch with they're propensity of hopping around. I especially like the dominant males displaying and bouncing to tell me my presence wasn't invited.