you have to consider adult size..I have about 16" of adult size fish in my 120 gal reef. I did borrow a large Copper Banded Bufferfly fish to rid the tank of Aptasis and added a 5" Rabbit fish to eat some of the Bryopsis. The CCB will be leaving in a few weeks seeing how all the aptasia are gone and the Rabbit fish will also be going because most of the bryopsis is gone..after that I'll pretty much stay with what I have
Cherub angel
Royal Gramma
6 line wrasss
Hippo tang