Apera GroStar pH Calibration Kit pH 4/7 Clone Plug an in-line pre-filter with 200

an in-line pre-filter with 200 mesh (80 micron) screen

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)

hydroponic

Apera GroStar pH Calibration Kit pH 4/7 Clone Plug an in-line pre-filter with 200GroStar 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