I installed your AP-DW85 full flow filter under the sink and checked the TDS with a water tester. It's terrible! Compare to tap water (189ppm) and water with your filter. I measured 186 ppm. What's wrong with this product doesn't help at all. After that I tested a bottle of water (result 11 ppm). Can you review your filter and recommend which drinking water filter type suits my needs? We very much appreciate your concerns in this regard. TV tran.
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