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healthy root structure and successful planting
Professional grade
Recommended for hydroponic use
RHP certified for consistency
Bluelab® pH 4.0 Calibration Solution (250 mL) pH Probe Storage Solutions healthy root structure and successfulBluelab pH 4. 0 Calibration Solution (250 mL) The Bluelab pH 4. 0 Calibration Solution is essential for use with all Bluelab pH products for the calibration of Bluelab pH Probes. pH 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). To ensure solutions remain accurate: Avoid cross contamination Decanter into a
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