I am ordering a harem of lyretails (7 females,1 male). My tank is a 220. My question is could i add a lone male squareback the same day to avoid fights? Second question how hardy are the squarebacks? Thanks for the help... OOPS I forgot my specs. Its 6 ft long by 2 ft wide and tall. I have a few different clowns, an indian opcean sailfin tang along with a 2 small damsels a Mandarin, and a flame angel. Question will the anthias mess with cleaner shrimps or mithrax crabs????