Apera Instruments GroStar pH Calibration Kit, pH 4/7 - 8 oz. Each Grow Light Extension Cords & Power Strips This plant-based nitrogen

This plant-based nitrogen

Potassium also plays an important role in the forming of cells

Highly accurate

If you want to increase the height of your LITE LINE grow tent to 7'7"

It is soft to the touch and also helps to protect the longevity of the Dual Carbon Filter

Apera Instruments GroStar pH Calibration Kit, pH 4/7 - 8 oz. Each Grow Light Extension Cords & Power Strips This plant-based nitrogenGroStar by Apera pH calibration kit (pH 4 7, 8 oz. each) Kit Includes: (x1) 8 oz. pH 4. 0 calibration solution (x1) 8 oz. pH 7. 0 calibration solution pH measuring equipment must be cleaned and calibrated regularly to ensure accurate readings. High accuracy (0. 01 pH): standardized against NIST Certified pH references within 0. 01 pH at 25C (77F). ideal for the calibration of all pH meters Color coded, double sealed, 1 year shelf life Expiration date