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→‎External links: rm allfilters.com link - had an email exchange with them, still not 100% satisfied with all the claims and references.
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== External links ==
 
== External links ==
 
* [http://www.raintree-foundation.org/AT/Appropirate_Technologies/Bio_Sand_Filter.html Biosand Filter]
 
* [http://www.raintree-foundation.org/AT/Appropirate_Technologies/Bio_Sand_Filter.html Biosand Filter]
* [http://www.allfilters.com/waterfilter Water Filter FAQs] - needs to be checked, and adapted here as appropriate.{{sp}} Note that some of the references, e.g.g on the [http://www.allfilters.com/waterfilter/bottledwater Bottled Water] page, don't line up with the claims made (looks like an editorial error, in that they're about completely different topics).
      
[[Category:Water_treatment]]  
 
[[Category:Water_treatment]]  
 
[[Category:Filters]]
 
[[Category:Filters]]

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