Product review (1 stars): Refrigerator filters apparently do nothing.
Not sure what's going on with these filters, but we bought 2 of them, after replacing them I tested the TDS of the tap water vs the refrigerator water and there was zero difference even after cycling 3 gallons of water through the filter. I'm convinced that refrigerator filters are just for show and actually do nothing. I went back to drinking my RO/DI water instead.