Yes there may be a chance with clay sorption.  You may want to
experiment with bentonite and montmorillionite clays to draw out
fluorides.
Michael

--- Marshall Dudley <[email protected]> wrote:
> Apparently not.  I called a number of supplier of filters a couple of
> years
> ago and asked if it takes out the fluoride.  They all said that it
> did not
> then talked liked that was a feature.
> 
> The water ionizers (alkalinizers) however do reduce the fluoride on
> the
> alkaline side, and enrich it on the acid side.
> 
> Marshall
> 
> [email protected] wrote:
> 
> > Does anyone know if fluoride can be filtered out of tap water after
> it
> > has been added by the local water agency?
> > Thanks,
> > jr
> >
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