Hey guys you may feel this is a silly question but i am trying to figure out what the problem is. I have a large rock of mature green star polyp and for some reason it recently wont open up. do they sometimes take a brake like leathers sometimes do? I checked all my water parameters and they are fine. the purple flesh on the GSP seem fine but i am just a little concerned. If anyone can tell me what i may look for or what i can do let me know. All responses will be greatly appreciated.