I caught an informercial for this "new" type of water softener, which claims to treat hard water through a replaceable filter using citric acid.
http://www.nuvoh2o.com/
[video=youtube;hYi0MmXDxQQ]http://www.youtube.com/watch?v=hYi0MmXDxQQ[/video]
http://www.nuvoh2o.com/
[video=youtube;hYi0MmXDxQQ]http://www.youtube.com/watch?v=hYi0MmXDxQQ[/video]
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