Depends on what is in it. I only dose B-Ionic to maintain calcium and alk. No special foods for the corals, but I do spot feed allmy corals that are capable of eating with pelleted fish food, 2 or 3 times a week, just for the heck of it, as to me they are interesting watching when they eat. Everything else gets what it needs from the waters trace elements, fish waste, lights, and any microscopic stuff fromthe frooozen locally prepared food I feed the fish....