The carbon will remove most if not all of the chlorine (our chlorine levels are around 4ppm), depending on the brand. I use one for my fills, and it removes most with a Rainbow cartridge, but I am told a GE cartridge will remove it all. It will also remove other things from the water, so they do have value, and they last a long time. I picked up 4 of the GE cannisters for $5 each at HD, a while back. i plan to add a second so that the mixed hot/cold water runs through the second one. At present, only the cold water runs through the carbon.
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