Hi there, I recently picked up this tang from a lfs two days ago. The worker there said that it had been there close to a week with no signs or symptoms of anything and this store is usually pretty good about keeping an eye out for potential diseases. I observed it eating and acting normal within the tank at the store so I brought him home and put him in my tank. The next day I noticed a couple of small splotches like the ones in the two attached videos, but attributed it to stress from a new environment or scraping up against some rockwork. I have been keeping a close eye on it today and it has grown about 3x in size and moved onto his fins from the couple spots I saw on his sides. He is still eating just fine and swimming normally throughout the tank. Any idea what could be causing these white splotches and any treatment ideas? Thanks a ton!