I have a med size puple tang and a slightly smaller powder blue, I have a pair of black clowns and a potters angel, I also have a melasarus wrasse and a Blenny. The powder and the purple are not liking each other, both are trying for dominance, even the clowns get into the mix every now and then. I have a 100 gallon with not to much rock so lots of space to swim. All suggestions will be appreciated. By the way they are all eating very well!