I am having the same problem with mine. It kinda comes out, like sticking its crown out of the tube, and then goes back in. Nothing in my tank is picking on it. All my other corals are doing great. Water parameters are near perfect. I am just tid bit measuring phosphate, nothing serious. My other coco worm is happy as a clam. Any anwer or solution ever come your way? I would love to solve this guys problem.
Thanks
REEFER545 :notsure: