last week I had purchased a finger leather coral acclimated it for about an hour. It has been in the tank for more then a week and it has not opened up at all. It shed a thin layer the very next day. What could be the reason for not opening up. when I switch on the lights few of the polyps come out less then half way but do not open at all. At the LFS they were opened but they don't open up in my tank. The coral was under PC lighting at the LFS and I also have 2 x 65 Pc lighting. Help Please.