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distilled water
The lower the TDS level in the water
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So why wait
All-New 4 in 1 Tds Meter Digital Water Tester premium-aplus-module-32024 All New 4 in 1 Tds Meter Digital Water Tester A Must Have Tester for RO Systems The ppm pen is the perfect way for measuring and tracking your waters levels of TDS to make sure your water filter is doing its job. With this water ppm tester, you wont just need to take the filter manufacturers word that it reduces TDS in your water; you can test! Test before you drink! We cannot visually determine the purity of drinking water. Even seemingly clear
