Get both at http://www.sunstoneherbals.com/cs-shop.htm sol wrote:
> Catherine, A TDS meter is not the same as a PWT, though. I thought > the PWT is best for testing DW and for estimating ppm (from uS) of the > finished CS? paula > > ----- Original Message ----- > From: C Creel > Try > TDS http://www.automatedaquariums.com/h_tds1.htm Regards,Catherine >
