General Hydroponics pH Calibration 4.01 Solution, qt

General Hydroponics pH Calibration 4.01 Solution, qt[ GPCSF532 ]

$13.01 $21.50

Gardeners can adjust their pH meters to 4.01 with this 32-ounce Calibration Solution. Simply immerse the pH electrode in the solution for one minute prior to calibration.



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