I have quite a bit of rock and African cichlids all like peacocks. Max size is like 5-6 inches I believe. I have like 7 at the moment and wanting to get 2 jack dempseys. Are they even compatible? How big do they get? If that's fine how many could I fit in there with a common pleco? I know the place will have to go once he gets bigger but he's only 3 inches now.