I have a 210 reef tank and it's been going great, but I have a little concern. My acans have been closed for almost two weeks. I do see there feelers at night a little bit but not much. They are normally open all the way during the day and look great. Because of that I've been doing water changes and testing my water more then I normally do. In the last week I've done three water changes. Yesterday my elegance was all closed up. Which makes me a little more concerned. All my other corals look fine, and the fish are fine. The only thing that has changed is my lighting, but my acans where acting up before I changed the lights. I also have the lights on a three week acclamation process. All water tests look good. I don't see any fish nipping at anything. Looking for any thoughts. Should I keep doing water changes?