Bluelab 4.0 pH Calibration Solution Seaweed & Kelp FoxFarm engineered Cha Ching to

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Bluelab 4.0 pH Calibration Solution Seaweed & Kelp FoxFarm engineered Cha Ching topH instruments must be cleaned and calibrated at least monthly to provide you with the most accurate reading. pH measuring equipment is calibrated to pH 7. 0 first (buffer) then to pH 4. 0 (slope). Essential for use with all Bluelab pH products for the calibration of Bluelab pH Probes. To ensure solutions remain accurate: Avoid cross contamination Decanter into a smaller plastic cup Discard sample after use Store in a cool dark place Store with lid