Well I feed it twice a week. They need to be fed and with my tank being so small it is quite easy to feed but i also have to watch my feedings to make sure I don't pollute the tank either as I have no fish in there only a pom pom crab and a cleaner shrimp.
I feed it frozen mysis, brine and pellets using a turkey baster. I have just ordered some cyc-lopeeze pellets too that I really am looking forward to trying. I do turn off my filter even though its a small one it still blows the food off the suncoral.
When you do get a new one, put it in a place that is easy for you to feed it. Some people use a pop bottle cut out to fit over the coral and drop the food down on it that way, fish and other critter cannot get at it either that way or some take it out of the tank in a dish of tank water and feed it then put it back in the tank after its feeding is done.
They sure are pretty and I am going to get my butt in gear now and train it to open during the daytime for feedings as they are nocturnal. They are easily trained to open during the day providing there is food.
I also love the Dendros, I think I would have bought one of those instead but could not find any around here where I live. The suncoral is a nice addition though to the tank.