Bluelab® pH 7.0 Calibration Solution (500 ml) Replacement Air Filters They feature razor-sharp stainless steel

They feature razor-sharp stainless steel blades

1 Quart Bottle

Be careful not to expose your seedlings & cuttings to direct sunlight or artificial light that is too strong

spring and/or fall plantings or other cool weather applications

Bluelab® pH 7.0 Calibration Solution (500 ml) Replacement Air Filters They feature razor-sharp stainless steelBluelab pH 7. 0 Calibration Solution (500 ml) 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