The Hannah pH and TDS meters can be dried out to work good as new. I know, and hope you never have to learn the way I did. Kevin Korotev Milwaukee ------------------------------------------------------------------------- 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"!