Bluelab® pH 4.0 Calibration Solution (500 mL) Fungicide and chelated iron

and chelated iron

Botanicare® Liquid Karma®

lawns and gardens

Two-Spotted Spider Mites

DTE Kelp Meal 1-0

Bluelab® pH 4.0 Calibration Solution (500 mL) Fungicide and chelated ironBluelab pH 4. 0 Calibration Solution (500 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