Hippo tang has white spots

[sdeschutter]

Hi everyone this is my first post!!! About time . Anyway I'm A little concerned with my blue tang. I have had the blue tang for about two weeks and three days into having him in my tank he started to develop white spots. He is eating and swimming he seems okay. Is it Ich? What should I do? I have read from other sites and forms that I shouldn't be too concerned A) because he is eating and B) he seems to be pretty active. But I'm still worried because the spot seems to be getting worse and I do see him from time to time trying to rub his side. I also see him kind of make these jittery swims like he is being bothered. I bought a cleaner shrimp about three days ago and was hoping that that this would help. But still I'm not sure what to do.