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Colloidal silver is sometimes applied to the ceramic pot after firing or added to the clay mixture prior to firing. Colloidal silver is an antibacterial which helps in pathogen removal, as well as preventing growth of bacteria within the filter itself. Some ceramic pot filters also include activated charcoal in the clay mixture to improve odour, taste, and colour.
150,000 filters are used in Central America, Asia and Africa.
CARE, UNICEF, Red Cross amongst others use the filter.
In Nicaragua, Guatemala and Cambodia the production of this filter is a commercial activity and production is starting up in six other countries.
==How Does It Remove Contamination?==
Local production of the filters is common and preferable. A quality control process to ensure filter effectiveness is required. The lower container, lid and tap can usually be purchased locally.
* [http://s189535770.onlinehome.us/pottersforpeace/?page_id=125 Complete production manual is available from Potters for Peace]
=====Materials and facilities=====
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Note: Program, transportation and education costs are not included.
Cost of introduction: US$ 15,000 - 30,000 for project incl. training, machinery and a first production of 500 filters. US$ 50,000 - 100,000 for project incl. production shop, training, first promotion, and 5,000 filters.
==Movies==
* construction video [http://nl.youtube.com/watch?v=JSBU-MLwDmk&feature=related nl.youtube.com/watch?v=JSBU-MLwDmk&feature=related ]
* Explanation Espanol [http://www.youtube.com/watch?v=-2c2bmg7yCM www.youtube.com/watch?v=-2c2bmg7yCM ]
* Panel Discussion English [http://video.google.com/videoplay?docid=6838040406197916953&hl=en video.google.com/videoplay?docid=6838040406197916953&hl=en ]
==External links==
*[http://www.filterpurefilters.org Filter Pure, Inc]
*[http://www.pottersforpeace.org Potters for Peace]
* [http://www.potpaz.org www.potpaz.org ]
* [http://www.ceramicatamakloe.com www.ceramicatamakloe.com ]
* [http://www.elfiltron.com www.elfiltron.com]
==Footnotes==