If it looks like a ciliate, which is a protozoan, try Metronidazole which is anti-protozoal/anti-biotic and it won't knock out your beneficial bacteria either. Gabriella Kadar Toronto ------------------------------------------------------------------------- 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.