GENERAL HYDROPONICS STANDARD pH REFERENCE SOLUTIONS

“General Hydroponics Standard Reference solution

For calibration of pH Meters”

 pH 4.01 Solution 8 oz

 pH 4.01 Solution quart

 pH 7.0 Solution 8 oz

 pH 7.0 Solution quart

$7.99

$21.50

$7.99

$21.50

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