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Hiraethore PH Meter, Digital Meter for Water, Tester 0.01 High Accuracy Water Quality with 0-14 Measurement Range, Suitable Household Drinking Aquarium, Swimming Pool, Spa?
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1 review of this product found across Reddit:
1 point
·
14th Apr 2022
I've been really pleased with this one
https://www.amazon.com/gp/product/B09RWKKWL4/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I've checked it's calibration several times and it's always pretty close in agreement with the water testing method with the ph up / down kit I bought
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