Hanna calibration kits
Has anyone tried out the Hanna calibration kits for the Hanna Checkers? Before I go ahead and order a couple, I'd like to hear if they seem to work ok.
I don't think my HI713 PO4 Checker is reading accurately, so I would like to confirm, and I may as well check my HI755 Alkalinity Checker while I'm at it.
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~ Mindy
SPS fanatic.
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