My coral has been doing really bad as of lately. Some have bleached and others have died. As for the past year I haven’t had many fish only 1 clown in a 60 gallon. The nitrates have been at 0 for the pst couple months and everything else seems pretty normal. I haven’t changed my lighting in a very long time so I don’t think that is the reason. My mushrooms have died, my trumpets shriveled, and my lobo is receding. Would getting some more fish help? What could fix this?