I have a small group of Green Zoanthid's and they seem to not open up very much, I have 260wts of CP's, and the tank is a 120 gallon reef tank. I have them up on a rock about have way up the tank, and seem to have some good water flow on them. Where should i place them, and any suggestions on why they are not blooming or growing more. Someone suggested that i need to add more Idione to my tank. I dont add any now. maybe that is my propblem. Any help would be appreciated. Thanks, Carl.