Apera GroStar pH Calibration Kit pH 4/7 HGC700597 or punch several small holes

or punch several small holes in the cap and place in desired location

Steel frame and aluminum blades for maximum durability

Hydrofarm's Commercial Heat Mat helps maximize your growing area by letting you daisy chain up to 4 of the MTMDA add-on units to this one

apply drenches toward the end of irrigation period

Easily produces 60 gallons per hour of clear water and has a filter capacity of 3

Apera GroStar pH Calibration Kit pH 4/7 HGC700597 or punch several small holesGroStar 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