During the past 2 weeks my Zoas have seemed to not be too happy. All of my other corals (ie, frogspawn, hammer, Rics, mushrooms, GSP, Birdsnest, Cactus coral, Pipe organ, Devils hand, Candycane) in the tank are doing great. However, my Zoas are not fully opening. They all seem to be partially open, with their skirts still tucked in. I have not changed anything really. Any suggestions? Here is a pic that I know is not the best quality, but it is taken from my phone. It just shows that they are not fully opened.
