My 20 gallon currently has a black ocellaris pair, yellow watchman, and a tobacco basslet. I will be getting rid of the basslet and YWG. I plan on adding a firefish and a skunk cleaner. Any suggestions for a 4th fish? Also, since it's always best to add aggressive fish last, should I remove the ocellaris pair when introducing less aggressive fish?
PS: I like fish that swim in the water column.
PS: I like fish that swim in the water column.