Editorial Product Review:Item Description:Pitcher Water Filter Replacement Cartridge. A 4-stage filter, capacity: 2,000 gallons. Filtration stages: 1, 2. KDF55 and KDF85 reduce iron, mercury, copper, nickel, chromium and other dissolved metals, and harmphul bacteria 3. The ion exchange resin reduces heavy metals such as lead, copper, aluminum, and water hardness. 4. Granulated activated carbon (GAC) reduces chlorine (99.9%), bad taste and odors, reduces pesticides and chemicals that are linked to cancer risks (benzene, TTHMs and toxaphene)
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Customer Rating: 
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2,000 gallons filtering? I think not.
I used the Crystal Quest pitcher for about 6 weeks and it was 6 weeks too many. This pitcher is poorly designed. It is small, narrow and the capacity is not even close to the 10 cups they claim when the filter reservoir is present. The spout is too narrow so it pours slowly. Water glugs out and splashes all over if you tilt it too far. The lid must be held with your free hand when pouring or it will eject if any water is present in the reservoir. The handle is too narrow and is not comfortable to hold, especially when full.
Even worse than the design of the pitcher, the filters only lasted for a few weeks! I went through three filters in the six weeks I used this piece of junk! Yes, you read that right. The first day, your water will flow through quickly. The second day, it slows noticeably. By the fourth day, it starts to take a LONG time to pass the water through the filter. By the end of two weeks, it could no longer pass a full reservoir of water through the filter within 12 hours! Seriously!!! It would literally only pass about 3 drips of water per minute through the filter after only a few weeks. I can't use that!!! Who can? It was insane! I am one person. I was not even close to using the filter's claimed capacity of 2,000 gallons! I went through THREE filters!! I thought maybe the first one was defective, but after the same performance from all three, that was it. Completely unacceptable.
As if that wasn't enough, another troubling issue is the fact that the filters are put together with some kind of glue or adhesive. Seems to me like a bad idea to expose the water I'm supposed to be drinking to a chemical adhesive instead of using plastic tabs to hold the filter cartridges together. What rocket scientist designed that?
I recommend that you stay away from this product. I was using Britta for many years before this, and I have now switched to Pur. The Pur filter pitcher is superior in every way to this (and the Britta I had), and I have not experienced any issues.
Customer Rating: 
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Not bad... Great value
my apartment had the worsted tap water I ever tasted, part mold, part chlorine, part I don't even want to know. I have used a number of pitchers and faucet mounted filters and this one isn't as good as some. That said I never started with tap water this bad. It should be noted that ever time I fill up the water pitcher the better the water taste.
In the end the water in the fridge right now tastes fine.. I am very happy with the product, it isn't the biggest and may not be the best, but the long filter life is a great value to me. I might get a second one because I am drinking a lot of water now.