We read reviews of fluoride filters and how many didn't really remove fluoride. We purchased the iSpring US31 3-stage large capacity under sink drinking water filtration system including 2 CTO carbon block filters for sedimentation (latest version) and used 2 fluoride filters and 1 carbon just to check all the basics. We ONLY use it for our drinking water! We only have a small tap for drinking water. Thus, not all the water in the house flows through the system. After running the water through the filters for several days, we took samples from our main house faucet (A) and our drinking water faucet (B) and sent them to the lab for analysis. We did this because we wanted to make sure the fluoride filters worked, otherwise we would have sent it back given the cost. You can see the results in the picture, there's a lot less fluoride going through the filters. We don't know if the sum will be the same with a filter.
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