GroStar pH calibration kit (pH 4/7, 8 oz. each) Aeration Media sold separately: You can

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GroStar pH calibration kit (pH 4/7, 8 oz. each) Aeration Media sold separately: You canGroStar pH calibration kit (pH 4 7, 8 oz. each) Product Details GroStar 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