Well my blue hippo tang keeps rubbing himself on rocks. This is my first tang. I got him from my Lfs 4 days ago. The guy there said that these tangs usually act weird. So is this normal weird blue tang behavior or something else like ich or velvet. He looks fine and eats like a pig on anything. He is very active and normal except for the rubbing. He is currently in a 10 gal quarantine tank. I haven’t started treatment yet but intended to do two rounds of prazi pro and then possibly copper. The lfs said he was treated with copper and prazi.