iodine and phytoplankton. I dont think it actiually eats iodine but I have heard people having luck with iodine and high iron levels. they are a lagoonal coral and like enriched nutrients in the water. so you are going to want to dose phyto once or twice a week and keep a moderate flow on him.
zoo plankton is good too. The more variation the better. I would try and stick with more live stuff though. DT's phyto and live copepods are definitely the best, but like they always say, variation is they key to success.
ive only got kent iron now and its doing great with it, he finally bloomed fully for the first time in my tank this morning. im going to buy some iodine and phytoplankton now later today.thanks