i recently purchased a 3in pacific blue tang about 2 days ago. Looked healthy before i got him but was a little stressed when i put him in my tank. Today i noticed 2 very very small white dots on the black part of his left side. I looks like he is itching both sides of his body on the rock. Is this a definate sign of a disease? I have a bunch a fish that i dont want to get sick so if theres something i should do first? My buddy is coming over w/ ich medication and a sick tank. thank you.