It depends on the fish, they should get along but you never know. I have a powder blue and a red sea sailfin sometimes they seem fine sometimes they don't. Over my years of dealing with fish i've noticed they all have different and unique personalities. The key with tangs is putting them in at the same time if one has time to establish itself then you throw in the 2nd things probaby will not go so well, also try and get them the same size or at least close. Good luck. :happyfish