My understand is that convicts are alright so long as they don't pair and start breeding. Yes, CA cichlids will cross with relative ease but that doesn't mean it will for sure happen either. I actually just picked up 3 Denison barbs and 3 red rainbows to go with my red severum so he can get used to them for when he moves up to his 75 in the next 6 weeks. Point being, yes I think rainbows make ok dither, but I'm about to learn first hand.



