Calibration & Reference Solutions
General Hydroponics pH Test Kit
$10.00
$3.50
General Hydroponics PRO pH
$97.00
General Hydroponics pH Down Liquid
$11.00
General Hydroponics pH Up Liquid
HM Digital 1000 ppm TDS Calibration Solution 3 oz
$11.38
HM Digital PH-STOR pH Electrode Storage Solution
$8.48
Apera GroStar pH Calibration Kit pH 4/7
$17.00
Apera GroStar pH Probe Maintenance Kit
$21.00
Apera GroStar pH Calibration Kit pH 4/7/10
$25.00
Apera GroStar EC Calibration Kit 2.77EC
$14.98
Front Row Ag Clean Up
$60.00
Hanna GroLine Storage Solution
$18.00
