I really like this system. I've been using it for about 1 week. Connection to the tap is very easy (adapter included). I read in the instructions that the test should be done after 20 gallons of water has run through the system. I was able to test today. Initially my tap water TDS was 340ppm, after filtering 45ppm pH 8.6 is a bit higher than I expected (my goal was pH 8-8.4) but I've come to terms with it. I am happy with the purchase.
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