is this a reef tank? do you plan on making it a reef tank in the future? if the answer is no then you could dose the tank with copper. it does sound like ich to me though. it takes a long time to kill off the entire life cycle of the little buggers. i actually thought it was closer to 2 months, 60days, needed to kill the entire life cycle of the parasite.
here is a great thread on the subject.
G~
here is a great thread on the subject.
G~