Recently many of my corals have not been opening. I went to get my water tested and found out I had low alkalinity and ph which I have since raised back to normal. It’s been a few days and some of my corals have still not opened including zoanthids, green star polyps, a Kenya tree, and a Duncan. My Duncan coral especially, has not been looking too well and is even lost some of its green color. My parameters look fine, including nitrates, phosphates, and ammonia and fish seem unbothered, so is there anything I can do to somehow help revive these sick corals? Any help would be great, thank you!