I've had a marine reef tank for about 3 months. Have added some live rock, and tried a few different fishes. All that have survived at this point are a clown (who is doing REALLY well) and a Sailfin Tang we bought about a week ago. The Last night I noticed some white blotches on the Sailfin Tang, and woke up this morning and there were more and it now has blotches on its fins. It looks too large to be marine ich, as they are blotches and not dots. I've attached a picture to help. It's not the best picture, but you can see the blotches. I moved him to my hospital tank I now have set-up. Added Maracyn-2 and Copper Safe to the tank. Any help identifying the problem or help with a cure would be most appreciated!