I have had my tank for about 5 months now and have never fed and coral directly. All my corals are doing very well. I have mostly LPS and a peice of Hollywood Stunner that has doubles in size in a month. I have been making my own food - shrimp, scallops, fish, mussle, clam, garlic, selcon, nori, cyclopeeze, spirulina flake food. I am sure that the corals are getting some of the food out of the water column as it floats by.