I just noticed the skirts of a couple of polyps on this colony have turned white. It can be seen best on the bottom of the colony. Of course I notice it right as I'm about to leave for a week I'm hoping it's not going to cause problems while I'm gone but I wanted to check. I've never seen this with zoas before It looks like it's expelled the zooxanthellae in its skirt. Any other ideas what this could be?
Also: params are stable.
80°
1.025
Alk: 9-10
Calc:460
Mag:1350
No detectable ammonia,nitrite, or nitrate as well as phosphate.
Everything else is thriving.
Edited by AcroNem - July 01 2015 at 8:19pm