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GroStar by Apera pH calibration kit (pH 4/7, 8 oz. each)
Kit includes:
(1) 8 oz. pH 4.0 calibration solution
(1) 8 oz. pH 7.0 calibration solution
Available in 230 ml bottles and 20 ml sachets. Traditional buffer solutions are packed in 230 ml leak-proof bottles and ...
$9.25
This item is sachets Available in 220 ml bottles and 20 ml sachets. Traditional buffer solutions are packed in 220 ml ...
$16.57
For use with HM Digital's PH-200 and PH-80 (as well as other brands of pH meters). Always make sure your ...
$5.87
Gardeners can conveniently test their moisture, light, and pH levels with the handy Active Air 3-Way Meter. Moisture readings register ...
$7.98