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Lend a Ph probe or test?
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06-10-2009, 03:11 AM
Mrfish55
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Join Date: Dec 2008
Location: Powell River
Posts: 669
Try cleaning it and recalibrating, as long as it reads the calibration solution quickly without bouncing the reading all over the place it should be good, mine last 2-3 years before I change them out.
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