I have a couple acros that the polyps only open at night. This didn't used to be the case. One of them is a Tyree pink lemonade that used to have hella long polyp extension for like the first 6-8 months I had it, but now it only has polyp extension at night. The colors are still as bright as ever and it's still for sure growing but during the day the polyps are closed up tight. It's been like this for over a month now. My water is good and I've been keeping a close eye out for any pests but haven't seen any. Any advice would be much appreciated.