I never feed anything as far as mushrooms w/ the exception of ricordia. I just feel they warrant a little extra attention. Twice a week a little chunk of squid or silverside. The flow in my tank is too much for them to catch tiny stuff. I could be wrong though. At least once a week I put a cube of Sally's cyclops in the tank and turn off my return pump. The cloud of tiny shrimp is usually gone within an hour. I have mostly lps, but the shrooms may be sucking some of it up.