Adding fish is difficult. I added a yellow flanked wrasse, beautiful fish to my 65 with two frost bite clowns, blue dot jawfish, hawkfish, tomini tang (all very small). The wrasse terrorized all of them. If any fish got to food it targeted, they were the target for the day. And I would feed heavy. I thought it would calm down but no luck. It really was a beautiful fish. Found him a home with larger fish and now it is doing well. I got luck I caught it... It stressed out my jawfish of course who died shortly after I caught the wrasse. Losses are hard..