I'm trying to figure out why my zoas aren't opening all the way my nitrates and phosphate are 0 and I've slowly ramping down my lighting and my flow to see if that helps but im just wondering if yall have any ideas I have had them now for 13 days I can try and provide more pictures of my other frags. One of the other frags is a single polyp and it is open about half way like the one in the picture. I have a other frag and it has 5 polyps on it and only one will open fully.