If we are starting all over, we will probably add another plant or two, and definitely don’t want to introduce any new parasites. The Otos in quarantine appear healthy and thriving, and my son would like them in the tank. Here are some photo links, which show the photos why I believe the fish had Camallanus. This looked very different from the anchor worm on its side, and definitely appeared to be multiple red worms in the anus. They would pull in and appear much shorter at some times than at others. The anchor worm did not do this, it was the same until it fell off and left the wound on the side of the fish. My husband, who has a background in biology and a PhD in genetics, also felt that the organisms protruding from the anus were Camallanus and not the same as the anchor worm. http://www.inkmkr.com/Fish/CamallanusTreatment/experience.html http://img520.imageshack.us/img520/2897/parasiteen0.jpg http://www.gaem.it/pubblico/articoli/malat