Hi guys! My grandmother is taking down her cichlid tank and wants me to take her fish. Most of them are not a problem; however, she has one male Cynotilapia afra "Cobue." I have about a half-dozen Pseudotropheus demasoni (I started with 15. Man those guys are vicious to each other.) My tank is a 48" 90 gallon. Does the afra look too much like the demasoni? Will he just get killed by them? Or are they likely to leave him alone?