> Your diagnosis seems right. As Erik mentioned, piperazine (available > also for aquarium use from, if I am not wrong, Aquatronics) is one > choice. For nematodes this was unaffective in my experience. I'm sure piperazine will kill them but I think my difficulty was getting the correct doseage into the fish. > Another simple approach is to use Fluke-Tabs, one tablet/10 gal only > once (repeted treatments or higher doses may not be well tolerated. I also tried Fluke Tabs which I bought while on business in the US. They did not work and caused terrible trauma for the few catfish (Peckoltia, Corydoras) that I had in the tank. In the end the Levamisole Hydrochloride worked a treat. Regards, Ken. ***************************** Ken Laidlaw Royal Observatory, Edinburgh Tel: 0131-668 8100 Fax: 0131-668 1130 Web: http://www.roe.ac.uk *****************************