Amazing and accurate. Wow I use this for my hydraulic system and I don't have room for a tank so I run separate buckets so it's easy to test 7 different buckets. I enjoy calibrating this bad boy and testing the waters. Will buy another one for my aquarium. After a week or 2 reviews it got 1 star. I had to calibrate it almost every time I tested the PH. In such a case, I would prefer to use the drip method. Returned.
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