hahaha okay...
Yeah I researched after you told me about the rocks and I read that same thing about the rocks. That is why I decided to move him and he just moved back. I have been dosing marine snow and phyto every day, just a couple of tablespoons when I feed in the morning. Even though he has moved, he seems okay. His mantl still looks good but his color is brown now. I think it's the angle though.
Also, I don't think he'll get sand on him. I don't have any digging fish or anything like that. just the twim spot who shovels and then funnels the sand back down. He doesn't stir the sand.