My digitata doesn't have hardly any polyp extension. For the last few days it has had a little spot that wouldn't extend, and then today it's mostly closed up. It's just a little 3in frag.
I have acro, monti, frogspawn, hammer, pocillopora, hydno, GSP, mushrooms, etc. and everything else looks just fine. I just did a 5 gal water change yesterday, and changed out my AC. I have a 75gal with 150 MH, and 2-96w CF. Any ideas?