General Hydroponics® pH Calibration 7.0 Solution, qt

General Hydroponics® pH Calibration 7.0 Solution, qt

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General Hydroponics® Meter Calibration Solutions

General Hydroponics® uses the highest quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General Hydroponics® technicians check each batch to ensure that our solutions are precisely calibrated and yield reliable readings each time they are used.

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