I filter my tap water twice with a gravity filter, first to remove large particles and last to remove small particles. The water seems even better than before, which I can see in the runoff and the subtle difference in taste. I don't believe what they say about fluoride because after a little research you will find that there are different types of fluoride and the type that causes water damage is from a study done in China. People who are paranoid about this are idiots. Another thing is that water from sewage treatment plants is ultrafiltered better than anything you will ever do at home. The idea behind filtering your faucet from a faucet is to remove everything that got into the water through the pipes on the way to you. Just thought I'd add this because all sorts of false fears are being spread around the internet and it's just plain rubbish.
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