Possibly a faulty batch but water tested in hazardous area with a TDS reader. The value 31 in front of the display corresponds to the incoming tap water. The red value 173 corresponds to passing through the filter. I don't particularly like leaving a bad review but wanted to post as a warning when filtered water is at such an unacceptably dangerous level. The TDS meter mainly measures particles, not necessarily pollutants. Obviously, filters let particles through. Maybe just activated charcoal, it's not dangerous. I received a quick refund with a 100% money back guarantee.
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