I'm sorry but I can't agree Slakker. I am totally with GSMGuy on this one. This is Ich, and whether it disappeared or not could be part of it's natural cycle. The only real method to rid himself of it is to QT and treat. And I am sorry but with all respects to Mikey but he is painfully new to the hobby (We all were and some made these same mistakes) but it should have been quarantined from the start. I think it's dangerous to suggest he do hypo salinity. Where a copper treatment in a QT is relatively easy to do, maintaining hypo salinity is not for a brand spanking new person. I respect your opinion and agree on principle, I just think it's application in this case is off the mark.
Mikey, get yourself a small 10 gallon tank, you need one. Get a small light or get a kit that has one with a filter and light on it. Put your fish in it with some PVC plumping fittings so they can hide and treat them with a copper based product to be safe. Do this for 4 weeks and Ich should go away.
Also keep this tank in a closet or wherever and every time you get a new fish, you put them in this special tank to watch them and see how they do. They will eat better when they are alone, and you can check them for Ich or other disease and you can treat them alone. It usually takes 2-4 weeks for them.
Happy Reefing and do yourself a favor and get a QT tank, if you don't, you will lose your tank one day.