Hi, i have had success killing hydra using Fluke Tabs at about 2/3 concentration. It kills them overnight and seem to have a lasting effect. ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@majordomo.pobox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@majordomo.pobox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!