Bluelab 4.0 pH Calibration Solution, 20 ml, case of 25 air-purification Each scalpel has its own

Each scalpel has its own safety sheath

and rarely used ingredients such as Biochar and Mycorrhizae

You can daisy-chain up to 4 of these units to the MTMDU unit to maximize your seed starting area

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

Bluelab 4.0 pH Calibration Solution, 20 ml, case of 25 air-purification Each scalpel has its ownCalibration 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