Apera Instruments GroStar pH Calibration Kit, pH 4/7/10 - 8 oz. Each 5x10 Grow Tents Color-coded spray stakes make it

Color-coded spray stakes make it easy to identify the flow from a distance

this formula was designed for use in water culture systems

glossy purple

Spray the entire plant with the lights off

700 scale crawlers or 6

Apera Instruments GroStar pH Calibration Kit, pH 4/7/10 - 8 oz. Each 5x10 Grow Tents Color-coded spray stakes make itGroStar by Apera pH calibration kit (pH 4 7 10, 8 oz. each) Kit Includes: (x1) 8 oz. pH 4. 0 calibration solution (x1) 8 oz. pH 7. 0 calibration solution (x1) 8 oz. pH 10. 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,