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GroStar EC Calibration Kit (2.77 EC, 8 oz. each)

GroStar GS1 PH/Temp (2-IN-1) Pen

GroStar GS1-E replacement pH electrode

GroStar GS2 Soil PH/Temp (2-IN-1) Pen

GroStar GS2-E replacement Soil Spear pH electrode

GroStar GS3 EC/500ppm/700ppm/Temp (4-IN-1) Pen

GroStar GS3-E replacement EC electrode

GroStar GS4 pH/EC/500ppm/700ppm/Temp (5-in-1) Combo Pen

GroStar GS4-E replacement pH/EC combo electrode

GroStar pH Probe Maintanence Kit

GroStar pH calibration kit (pH 4/7, 8 oz. each)

GroStar pH calibration kit (pH 4/7/10, 8 oz. each)