not a problem bud, ok for one i think you are a little low on lighting. you migh tlook at gettign more lights here in the future. where is the plate located at? if its at the bottom of the tank, then hes is gettign even less light than those corals that are closer to the light source. since corals do derive most of their energy from the algae in their tissue, light is very important to them, and if he was not gettign enough light, and wasnt being fed by any secondary supplemental foods,then he might jsut be wasting away. are all his tentacles still out but are just losign thier color and turnign white? or is it not opening at all and the white skeleton showing?
again sorry to ask so many questions, but i think lighitng is the most important thing to consider about a reef tnak, and should be where the most money is spent!
good luck
jon