Bluelab 4.0 pH Calibration Solution, 20 ml, case of 25 air-purification Effective alternative to synthetics

Effective alternative to synthetics

and rarely used ingredients such as Biochar and Mycorrhizae

inline duct blowers constructed from quality steel with heavy duty attractive hammertone powdered coat finish

Add 2 tsp (10 ml) per 5 gallons of soil

Grodan Gro-SmartTM Tray

Bluelab 4.0 pH Calibration Solution, 20 ml, case of 25 air-purification Effective alternative to syntheticsCalibration and conductivity standard solutions a must in every grower's toolbox. The Bluelab calibration and conductivity standard solutions are essential for use with all Bluelab products for the calibration of pH and testing the cleanliness of the Bluelab Conductivity Temperature probe. Bluelab solutions are manufactured specifically for Bluelab products and are referenced to high laboratory standards to ensure your Bluelab products last longer and