My Midas Blenny and Royal Gramma never liked each other. They ended up getting into it pretty bad, and both died from a result of the fight. Im now back to just 4 fish. I have Banggai cardinal, Clown, Flame Hawk, and Melanrus wrassse. What are some good ideas for replacement fish, that will get along with what I have, and each other. Tank is a 40 breeder.