I fed mine a mixture of reef chilli, mysis, and crushed flakes. I do not spot feed. They are mostly photosynthtic so the extra he picks up from the water is a bonus.
I do but not with the same persistance as I do other LPS like brain and candy cane. I feel they can do with or without feeding but since I'm in there a little cant hurt. I dont feed ANY LPS phyto just zooplankton or other meaty food.