BlueLab Calibration Solution - 4.0 pH Size:250 ml You can use these with

You can use these with any of your favorite growing media

purified water and a food-grade thickener

Mix Athena Cleanse at a rate of 5-10 mL/ gallon of water during the final flush stage to help reduce residual mineral buildup in the growing media and plant tissues

epoxy-potted

BlueLab Calibration Solution - 4.0 pH Size:250 ml You can use these withThe Bluelab Calibration Solutions are a very necessary part of a growers toolbox. These solutions are manufactured specific to the calibration process and referenced to high laboratory standards by Bluelab. They are required for the calibration of pH meters, pH monitors and controllers. Regular cleaning and calibrating of pH measuring equipment ensures accurate readings. Bluelab's EC CF equipment does not need calibrating, as they are all factory