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PH Meter Digital 0.01 PH High Accuracy Water Quality Tester PH 0.0-14.0 PH Monitor ATC Portable Pocket Pen Measurement for Household Drinking Analyzer Pool Water Aquarium Swimming Pool?
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1 review of this product found across Reddit:
1 point
·
26th Jan 2020
I'm using this one from Amazon. It was calibrated using the 6.86 solution provided. I've been hitting 5.2 - 5.4 for years by treating RO with salts. I just wanted to see what this would do.
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