Non-photosynthetic, so you NEED to feed it.
Typically won't open its polyps in the "daylight" easy way to "trick it" is to put it under a shelf or something such that it's shaded, then it might have the polyps open all the time for feeding, and if you're really clever have some flow that goes through it such that when you feed your tank (fish etc) the food goes near it and it can grab it.
Nice pretty coral, however a pain to keep IMO just because you need to feed it.