Bluelab 4.0 pH Calibration Solution soil Wash fruits and vegetables before

Wash fruits and vegetables before use

BENEFITS A great organic source of nitrogen and potassium

The 4 Pot XL System is extremely versatile and can be used for a wide range of plant types and sizes

Benefits of the Black & White

Meets NSF61 standards

Bluelab 4.0 pH Calibration Solution soil Wash fruits and vegetables beforePH measuring equipment must be cleaned and calibrated regularly to ensure they are giving the user accurate readings. pH instruments are calibrated to pH 7. 0 first (buffer) then to pH 4. 0 (slope). Calibration Solutions should be stored in a cool place out of direct sun and heat. They should be stored with the lids securely tightened.