Thank you Sarah, I will look for Levamisole HCL immediately. Do you know what effects this treatment will have on baby fish? They're about 0.5 cm in length and have lived their lives to date in the "infected" tank. Neither they nor their mother show any signs of distress, but obviously if there's any chance that they have worms I would like to treat them as well. I assume there's a particular size at which they become succeptible, and that they are far more likely to perish from this than a larger adult. Thanks for any additional insight! Charles _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!