I have a maroon clownfish that eats extremely well. I feed him a solution of mysids, brine shrimp, selcon, and several other types of frozen foods about twice a day, I keep it refrigerated and just pour it into the tank. Recently he was sharing my 20 gallon reef tank with a blue devil damsel but the blue devil was returned to the LFS today. The maroon clown seems to be loosing color at the tips of his fins. They are turning clear and it looks like he is getting small brownish/red blotches on his body it is hard to see unless you carefully examine him. I got a neon goby in hopes it would eat some parasites in the tank as well as off my clownfish. I have been doing water changes and all of the normal things that are necessary to maintain a fish tank. Do the experts think this is a micro organism causing this stress or something with the tank or my feeding methods? I am thoroughly confused although the maroon does not seem to be in any immediate danger.