My girlfriends zebra angel keeps nipping and chasing away her black angel, She was wondering what would be the best way to curb aggression in angelfish. They both live in a 45g, well planted tank, they are still pretty young and the only other fish in this tank are some corys a golden dwarf cichlid and a brazillain puffer. Would more angels spread the aggression out so that there is'nt so much nipping between the two of them? I also hear that you shouldnt keep angels with similar markings together as it causes the similar fish to fight (i dont really know about that one) I was hoping i could get some suggestions to keep things under control