Mike thank you for the reply ..With that info I know that meter would not be good for what I needed it for...I am glad people here are of the greatest help to other people seeking help. Again I thank you...I quess I will seek a meter in 0-1999 ppm range like the one I had .. AL ------------------------------------------------------------------------- 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://www.digital.com for "Apistogramma Mailing List Archives"!