I have an RODi system with 2 RO membranes and 2 DI chambers. I noticed that my DI resin was starting to look hard in the front chamber, so I emptied the chamber and filled it with new DI resin. Now I have an output TDS of 1 with an input just before the 2 DI chambers having a TDS of 4. Any idea why/how changing out the DI resin has done this and how to fix it? I'm guessing I should just toss out the water it made too?
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