Kathy How many water changes were needed to get the tank clear again after using the malachite green? This is always my biggest fear of medicating a large tank, plus i hate the silicon color changes. John ------------------------------------------------------------------------- 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"!