ICK
Go to reefcentral and look at reefkeeping, 8/03 & 10/03 for a good article on treating ick. If I were you, I would take the fish out and give a 30-45 minute formulin bath, then treat with hyposalinity for 3 weeks. I would also take out all the other fish and do the same with them. If you don't treat all the fish, you can not eliminate it. You also need to leave your tank fish free for at least 4 weeks. There is no fast and easy cure. You should assume any new fish you want to add to your tank has ick and treat it first before you add it to prevent any problems.
If you have any questions, send me your phone number and I will call you.