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7.0 pH Bluelab Calibration Solution 20ml, case of 25

Calibration and conductivity standard solutions... a must in every grower's toolbox. The Bluelab cal..


Bluelab 2.77 EC Conductivity Solution 500 ml, case of 6

The 2.77 EC Conductivity solution is used as a reference or checking solution to ensure you have ade..