I've seen a recommendation to try Nurmberg Scientific for 100 packs of pH test papers, ~$12. I do not know how the values are shown however. http://www.nurnberg.com/index.php?page=start Ann Viverette _______________________________________________ Aquatic-Plants mailing list Aquatic-Plants at actwin_com http://www.actwin.com/mailman/listinfo.cgi/aquatic-plants