How does one lower the pH of RO water without driving up the TDS? My new RO produces water that is pH 8.0 and 10 uS. If I add pH down to lower the pH to 6.5 the TDS reads 90 uS. ------------------------------------------------------------------------- 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"!