This question comes from a PB tang that started acting funny. I have noticed a few bumps on its skin and trying to scrape itself on the rocks.
Tank is 58G show. Wet/Dry, CPR back pack skimmer, U/V filter, 1 96w blue and 1 96W 10,000k C/F lights. About 50# live rock, 1 maroon clown (no...