Measuring the pH of distilled water is almost meaningless as it takes very little difference in H+ concentration to change the pH dramatically, and the accuracy of your measurement won't be that great as a result. -Doug Brown debrown@kodak.com ------------------------------------------------------------------------- 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"!