Okay I'm thinking my zoas are doing good most of the pox has cleared up... but now I'm seeing these long dark things coming out of their mouths. I saw it first on one of my palys. But now looking at one of my zoa colonies I saw this long dark string underneath a polyp and then got a magnifier to look closer and several have the same thing but it's coming from their mouth. What are they doing??? I've heard of them expelling their zooxanthellae... could this be it? Is this bad? 