I have two in my 29. They are both under rock ledges. As stated before these are nocturnal corals. Mine only "grow" and feed at night. The will get HUGE and in my case have white polyps. I feed mine directly using a turkey baster. I feed them Reef Chili, DT, Oyster eggs, and Reef Snow. I alternate the chooses. I would leave it alone and just continue to feed it should develop a routine and inflate at about the time you feed them (like my sun coral). IMO. . .