Does anyone know why my green star polyps won't open. I did the proper acclimation process when I bought them. I have them on the bottom of a 24g nano cube with pc lighting. Should I move it to the top of the tank, closer to the light itself? The bulbs are approximately 6 months old. All chemistry is at optimal levels. The star polyps were in a tank with t5 lighting, will that make a significant difference or a change to why they won't open opposed to having them in a tank with power compact lighting? Anyone know or can help it will be greatly appreciated. Thanks, M Leezy