I recently got a Pagoda Cup coral. Its about dime size. I glued the frag plug to a 4" rock and I put it at the bottom of my tank in not much flow. It doesn't seem to be opening. Some new Duncans are close by. They are settling in. I run Maxspect Etherals and they are set and keeping GSP, Sinularia, Xenia and Anthelia a with no problems. Any tips? Should I worry. Its been almost a week.