Well I believe that I have Nudi's. A few months back I noticed a half eaten frag of Zoas with a Nudi on it. I removed it and everything else seemed fine. Now a few of my colonies are being eaten it seems. Today I went out and bought a 3G eclipse as a quarantine tank. I pulled out all of my zoas (12 small colonies / frags) and dipped them in a freshwater lugols dip. No nudis fell off. I guess I will just keep them in the quarantine tank until I figure out what else to do. Any suggestions?