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GroStar by Apera EC Calibration Kit (2
so you can use it up to the day of harvest
Decision may cause yellowing of the plant in both older and newer leaves if overused
Light weight
GrowoniX Spun Sediment Filters Extra Large Gloves GroStar by Apera EC CalibrationSpun polypropylene: A true multi staged depth filter utilizing separate layers of micron filtration. Constructed of spun polypropylene, these filters offer superior dirt holding capacity at an extremely economic price. Great filter for changing frequently, especially in well water applications. High dirt holding capacity. 100% Pure Polypropylene. Made with FDA CFR 21 approved material. NSF Standard 42, 61, & 372.