I purchased two small false percula clowns about 10 days ago. The smaller of the two looks great but the larger one seems to have some issues. Both fish would not initially eat. I think this is mainly due to the fact that I tried starting them out on pellets. I then switched to mysis shrimp and they both appear to be eating even though it seems like they spit a lot of the food out. The larget clown fish seems to be fading in color and clamps his top find most of the time. I can't see any other external sign of disease/parasites. What actions should I take if any? Please help....