I just got four frags of xenia from a local reefer here in Dallas (thanks Jose!). I put them in the tank and I got a couple of them to stay in the holes in the rocks. the other two I had to hold the ends of the stalks down with a shell. My new koralia 2 is making some major flow. Anyway my question is will these things attach themselves soon like an anenome does? Also....I know xenias love iodine but what else should I be using? Do they need anything special to eat or do they just filter feed? Sorry for the noob questions....I just recently got interested in corals.