If anyone wants a cheap mini-pH electrode, you can check out this auction on eBay: http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=325849281 ================================================================ Robert A. LaBudde, PhD, PAS, Dpl. ACAFS e-mail: ral@lcfltd.com Least Cost Formulations, Ltd. URL: http://lcfltd.com/ 824 Timberlake Drive Tel: 757-467-0954 Virginia Beach, VA 23464-3239 Fax: 757-467-2947 "Vere scire est per causas scire" ================================================================