It depends on who you ask on what to feed SPS's. If you consult the marine biology books they state that SPS corals feed primarily on fish feces. Fish only digest about 20% of the food they consume, so the rest of the undigested food that sinks to the bottom of the reef and past the corals will get swept up and used by the SPS's. All I feed my tank is Zooplankton, Phytoplankton, and flake food and my SPS's seem to be great. And not to state the obvious you do need good lighting. DUH!