So I've been having trouble with my polyps (green cloves, blues, and yellows) it seems all they do is "survive" in my tank. Every month or so ill get a growth spurt then slowly decline again yet I'm getting amazing growth from all my LPS and SPS. My only theory is since I'm getting such good growth in my acros and not my polyps is that my water is to "clean". I'm kinda just taking a shot in the dark here so anyone with experience with this would be great.