Hello! First time posting here. I have had my reef up for 3 months. Slowly adding livestock. My last addition was a yellow tang that I have had for 1month exactly. He came in a bit skinny but has since acclimated to most foods and is eating garlic marine algae 1x a day. He scratched himself on the rocks a bit for the first 2 days but not after. I noticed his fins looked a bit tattered yesterday but today they are worse. All tank parameters are fine and the biggest bully I have is a Midas blenny! Any ideas? Thank you in advance!