I purchased a Hammer Coral (brown tubes with neon green tips) from my LFS a few weeks ago. It seemed to do well initially, but now it's looking rather wilted, and doesn't open up fully during the day. I have it placed on a rock fairly high up in the tank so it gets good light, with a medium water flow (gentle sway). I don't see any disease or change otherwise. My mushrooms and green star polyps all seem to be happy and growing fine and no issues with any other critters in my tank. Any suggestions on what to check for or to do to perk it up? I'd hate to lose it, it's beautiful.