What ended up happening to that frag?yeah, well.. looks like I have the same problem. I went to Vivid aquariums and picked up my first frag for my tank, I was monitoring the frag for some time, and noticed the polyp extensions, and saw that one polyp is not right, so I did some closer monitoring and watched that polyp moving without current, then I knew that it was not PE, I actually knew this was not normal since day one because tenuis sps have similar PE as this worm, but not the green slimmer.. going to call them up and see how to treat this or find out what their policy against infested coral is.