Tamberav Posted March 7, 2019 Share Posted March 7, 2019 It says when changes completely, so no? Looks like it is just starting to go. Can check with a TDS meter too. If you haven't changed your carbon filter in awhile, you might be wearing out your DI. I change my pre-filters every 6 months and my DI when TDS gets above 0. 1 Quote Link to comment
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