Quote Originally Posted by Big_Pun View Post
something that has happen to me..... zoas will get a skin whe they close up sometimes its a brownish color, ive used a feeding or turkey baster to blow it off and even a soft toothbrush gently, should see a skin sloth off.
good point, I've seen this as well and when left alone they just die but helping them as you mentioned seems to encourage them to open again...same for any type of cyano algae that might start growing on the closed polyps