http://www.maast.org/forums/showthread.php?t=39881

This is just one of the threads about ick. You need to look around this forum a little or do a search. There are a bunch of good threads that might help. The short of it is you need to use garlic extract to soak your food in to help entice the fish to keep eating(not fresh garlic that you would use for cooking), check and keep water quality as best as you can get it, Feed the angel a good diet targeted to its ntural diet to promote good health, and keep up with the care as ick can and will come back. Also try to find out what, if anything is stressing the fish.