Tony- I've used Fluke Tabs on Polypterus several times and I think it worked well without hurting the fish. It is often used for anchorworm. The free-swimming white strings might be something else (just a worm?). I've never seen the anchorworm larvae with just my eye, but maybe you've got good eyes. They would look a little like cyclops. I feel that I should remove the adult anchorworms by hand before medicating, because I think it helps head off further infection and the fish seem to take it pretty well when I do that. I've got some anchorworm pictures here: http://www.geocities.com/steevward/anchorworm.html Other medications than Fluke Tabs (Ich-type medications and of course copper compounds) are supposed to be effective in killing off the larval stages but it's hard to tell if they really work because sometimes the anchorworms just die off all by themselves. Steev ------------------ To unsubscribe from this list, please send mail to majordomo@thekrib.com with "Unsubscribe gsas-member" in the body of the message. Archives of this list can be found at http://lists.thekrib.com/gsas-member/