I have had zoanthids growing in my 14gal biocube, under 150watt MH for almost a year with no issues. Recently the colonies have closed up and havent opened for a couple weeks. Other colonies seem to be doing fine that live in the same area of the tank. I am concerned that they might melt away if they dont recover soon. I have thought about taking them out to dip them and than possibly put them in another tank with t-5s. I know zoas occasionally close up from time to time, but its been a long time since they have opened and seem like they are heading down hill. Any advice?