I received my pair from Hanna yesterday also and started immediately fiddling with them. My tapwater reads tds 158ppm at a pH of 7.4 .I lower my ph down to 6.6~6.2 with CO2 Injection and peat filtration in my 75g. The holding tank for waterchanges reads a tds at 150 ppm- peat filtration also. My growout and breeding tanks measured between 150~170ppm. Are these readings TDS considered good (soft) for apistos?Chemistry and physics classes are so long ago.I understand that there is no direct relationship between hardness and tds.What tds do you all shoot for ,around a 100ppm? Z-man do you have to keep the pH meter in a holding solution like Hanna's manual suggests? Any recommendations?BTW,know I understand how you dropped them in a tank :),almost happened to me last night. TIA Max -----Original Message----- > From: owner-apisto@admin.listbox.com > [mailto:owner-apisto@admin.listbox.com]On Behalf Of WnyZman@aol.com > Sent: Tuesday, October 10, 2000 3:02 PM > To: apisto@majordomo.pobox.com > Subject: TDS & pH Meters > > > Just wanted to say that Hanna was great as I have already revceived my 2 > meters ordered in just 7 days. BTW, I called them on the 800# instead of > through the Internet. Both are just like the one's I purchased > over 10 years > ago but eventually dropped them in the tanks. Those worked great > and I assume > these will also. > Z-Man > > > ------------------------------------------------------------------------- > 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"! > ------------------------------------------------------------------------- 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"!