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

the PX2 can control 512 digital HID fixtures (256 per zone)

quiet motor - maximum wattage and reliability

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

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