Joven Agricultor
Well-Known Member
$30 Hannah instruments digital Ph meter. Requires calibration (and calibration liquid ) I store my meter with the tip in 7.0 calibration liquid, hannah sells a storing solution. This meter is simple to calibrate, simple to use, simple to read, and was rated as the most accurate meter for the price.
http://www.amazon.com/gp/product/B0...SIN=B0085WO0GU&linkCode=as2&tag=growwcom07-20
http://www.amazon.com/gp/product/B0...SIN=B0085WO0GU&linkCode=as2&tag=growwcom07-20
