I've had this guy in my 90g for a few months now. Unfortunately, my two Clownfish have taken up residence directly over the clam. Since they have been bugging Mr. Clam all the time, the outer fringe of his mantle has begun to bleach. He also doesn't react to light changes as frequently because of the constant light changes of the fish swimming directly on top of him. The clam sits under a 150 10k Halide and PC actinics. However, it does appear to be showing some growth on the shell. What can I do about it? Before and after:


