My 3month old clown tang refuses to eat anything other than brine shrimp, he used to eat everything! Fattest fish in the tank, then I got flutes, witch cleared up quickly and he was eating normally again for about 2 weeks and now all of a sudden he is really dark in color and is "skin and bones" I've watched him closely when I feed and he will not eat pellets even if I soak them first and is minimule on eating brine shrimp. HELP! I don't want to loose him.