Blue tang or regal tang

[arnald]

My blue tang is covered with ick but no other fish have it. I don't really know what to do. Do I catch him if I can and treat him or do i treat the tank with reef safe ick medicane. He is not rubbing, but he is eating just like others. Is it because of the temp change attack we just had a couple of days ago or what. IF I have to catch him does anyone have any tips on how to catch him in a 150gallon reef tank.