ordered Monday, received Wednesday at 11:30. Read earlier in the afternoon! Very easy to use. Seems accurate. I record measurements for future reference. Tap water is 38 to me. Hydrogen water made from minerals using tap water was 54. Distilled water was 8 but it's been open for a while. Now I feel much better with tap water. I could make my own hydrogen water from fancy bottled water, but I drink a lot and don't want to buy it all the time. I run the tap water for a few hours to remove the chlorine. I thought after checking everything, now what? But I have since taken it out and used it several times. At Easter I will bring my daughter home and check her water. The manufacturer says that up to 40 is a good indicator. I agree. But higher tap water readings are acceptable from what I've read.
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