I have had guppies in with my mbuna fish for some time though they don't have more then two or three baby fish . That's all I want in it or the mbuna might get a bit much. I would like to know about more peacefull larger fish like peacock chiclids and how that effects them , I have heaps off shallow ponds around the top of the tank for them to give birth lots moss baby tears ect. With just guppies they breed well .i have the odd molly an platy amongst them too.