Haha, but for real, sun corals have no zooxanthellae, so they'll rely on capturing food particles to stay alive. You will have to spot feed this coral to keep it alive. They like better than average water quality, med flow.
Just to add what zesty posted. When you place them, generally on sand bed in a low light area. Be sure you will be able to reach them with a turkey baster, or what ever you will use to feed. Turn off all pumps and be sure tank inhabitants do not steal its food. They need to be feed at least 3-4 times a week.