got this off the net maybe it will help u out a bit i dont know to much about them.....
This is from an article by Julian Sprung;
Husbandry requirements for Heliofungia
Keeping Heliofungia in a reef aquarium is not difficult. One should of course avoid fishes that may pester or feed on the coral. Various angelfish and butterflyfishes fall in this category. The aquarium should have a sufficiently large flat horizontal area on the bottom where the coral can be placed, on gravel, sand, or rock. The coral thus will be correctly oriented with respect to the light, and will have sufficient room to move around. There should be no other corals, soft or hard, that the Heliofungia might contact as it moves around on the bottom. An exception is that there can be other Heliofungia. Heliofungia normally grows and thrives in captivity, but as I previously described, it is prone to infections. If the coral develops a brown jelly infection it is important to remove it from the aquarium. The fouling tissue from a dying Heliofungia may spread the infection to other corals, killing them in an effect like falling dominoes (Delbeek and Sprung, 1994).
Here's the link (
http://www.advancedaquarist.com/issu...003/invert.htm) to the article.