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

$18.99  $13.67

Earn 14 points
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GroStar EC Calibration Kit (2.77 EC, 8 oz. each)

$14.99  $11.24

Earn 12 points
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GroStar pH Probe Maintanence Kit

$23.99  $17.27

Earn 18 points
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GroStar GS4-E replacement pH/EC combo electrode

$79.99  $57.59

Earn 58 points
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GroStar GS3-E replacement EC electrode

$53.99  $38.87

Earn 39 points
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GroStar GS2-E replacement Soil Spear pH electrode

$181.99  $125.57

Earn 126 points
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GroStar GS1-E replacement pH electrode

$50.99  $36.71

Earn 37 points
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GroStar GS2 Soil pH Pen

$256.99  $177.32

Earn 178 points