Apera Instruments GroStar EC Calibration Kit, 2.77 EC - 8 oz. LED Grow Lights the Knockbox helps you accommodate

the Knockbox helps you accommodate for different diameters of pre-rolled cones

resulting in a larger growing surface with more density below the canopy

These base nutrients

Users can effortlessly adjust the height of the entire grow room’s light fixtures at the perfect height level with the touch of a button

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Apera Instruments GroStar EC Calibration Kit, 2.77 EC - 8 oz. LED Grow Lights the Knockbox helps you accommodateGroStar by Apera EC Calibration Kit (2. 77 EC, 8 oz. each) 2. 77 EC conductivity standard calibration solution Used as a reference or checking solution to ensure you have adequately cleaned the EC ppm probe Calibration Solution should be stored in a cool place out of direct sun and heat. Non hazardous product Please keep out of reach of children Made in USA