You have some very nice fish there, I would keep a very close eye on the dovii though, I am of the personal opinion that alot of ca cichlids will only challenge for dominance when they know they are of equal size size or bigger. I don't think they go of just length like we do but go more of hight and width of a potential opponent which there very good at. Parachromis spp are generally lighter then amphilophus spp, 12 inch parachromis weight is about 600 grams, 12 inch Amphilophus about 750 grams. Once your dovii gets about equal weight he will become problematic.