Apera GroStar pH Calibration Kit pH 4/7 Clone Plug Use Pro pH UP or

Use Pro pH UP or Pro pH DOWN to effectively adjust the pH of nutrient solutions or irrigation water

* Blinking green SLOW: If you see a slowly blinking green LED

A high nitrogen source

ProKure G fast-release gas — The chlorine dioxide breakthrough technology that controls odor-causing bacteria

quiet motor - maximum wattage and reliability

Apera GroStar pH Calibration Kit pH 4/7 Clone Plug Use Pro pH UP orGroStar by Apera pH calibration kit (pH 4 7, 8 oz. each) Kit includes: (1) 8 oz. pH 4. 0 calibration solution (1) 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