Got this TDS on a great Cyber Monday sale and I needed another one, there is one in my order Battery failed and this battery is not replaceable. . The first thing I love about it is the 2032 spare battery and it's cool that they give you an extra battery, just an extra bit of customer service. I only use it to test bottled water. I'll go and check if it's always under 50. My home water in Phoenix, Arizona is 556 and with the Moen carbon filter it's still 465. Easy to use, easy to read and I just love the baby green body color. It's nice to be able to test the water. 5 stars for the meter but 3 stars because it is made in China for a 4 star rating.
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