After reading many good reviews I was hesitant to buy these filters at first. Revain, so I tried. Conclusion: I managed 2.5-3 months of moderate daily use of two filters without any problems. They typically filter at least 128 ounces a day, seven days a week (more or less one day) and work just fine. In fact, I'm in the process of buying a second pack as I've just got my last filter. Maybe my tap water doesn't have as many filters, or maybe I use it a lot less than other reviewers. I assume that's the case if those who had problems decided to write about it here. I had NO problems and based on my experience I can recommend these filters 100% without hesitation. Do the math based on my daily use (128 x 75) and you'll see how long it's likely to last.
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