I have a 300 gallon with a 12" amaira, 12" mala ,10" redtail gourami, 14" ornate birchir and a 10" red pike. They've been together almost 2 years no aggression no fin nipping whatsoever. In a 75 grow out i have a 5-6" black wolf that's finally starting to accept tilapia but showing no interest in pellets yet. Would it be risky to add the black wolf to the 300 where all those fish are eating tilapia and pellets.