Well got an amazing looking clown tang from a lfs and was fat and healthy, also eating before I bagged him myself. (long time shopper) Brought him home and did fine for two days fought with my purple tang a little nothing major the usual run around for a new fish. So last night before going to bed I did a last look at the tank for the night with the led blues on and noticed a few dots. So I woke up today and tested everything and it checked out so I did a 20% water change figured sal might be a little off compared to the shop she was at. Also I added a little ph buffer to the tank (usually runs a bit low) so with all this done the ich is still no better and I'm out of ideas. The other fish are doing great. Purp tang, copperband baby clown trigger. Although he's still eating I am worried any suggestions?