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How to use a TDS meter to test water purity - total dissolved solids
Here's a quick guide on how to use a TDS meter to test the mineral content in your water. The TDS (total dissolved solids) level is measured in ppm (parts per million). For window cleaning, any reading of 10 ppm or lower is perfectly fine to get spot free window cleaning results. Buy TDS meter here: https://www.thewindowcleaningstore.com ...
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