I have 2 ecotech radions above my tank. 15 inches above the water. I don't think it is a lighting or flow issue. I even just double checked it. The polyps are still extended and moving nicely in the breeze...can't think of a better way to say it lol. My only thought would have been it got burned by salt...though I mix 24 hours ahead of time so I'm not sure how that would be an issue, or that something was nipping at it...but when I have a coral beauty, lawnmower blenny, indigo dottyback, and 2 b&w clowns I'm not sure who would even be interested...the beauty has never had interest in the corals and I have never seen it come close to one. All other SPS frags that were added at the same time are having no issues.