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The CannaMax Calibration Solution 1000ppm is a very necessary part of a growers toolbox. Fill a small clean container with only enough solution to cover the probe end. Adjust meter. Rinse probe with clean water. Dispose of used Calibration solution.
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First Time Customer
Get a one-time $10 discount on your first purchase of $50 or more using the code FIRST-TIME
Available for first-time customers only.
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