Bluelab® pH 4.0 Calibration Solution (500 mL) Hoses This sprayer allows you to

This sprayer allows you to easily take care of stubborn weeds and pests or fertilize and water your plants and garden

Keep an eye on the moisture in the cubes

and safety precautions

Does NOT contain pyrethrins or oils

Bluelab® pH 4.0 Calibration Solution (500 mL) Hoses This sprayer allows you toBluelab 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