http://www.alpharubicon.com/kids/homemadeberkeydaire.htm
Filters
http://www.ebay.com/sch/i.html?_odkw=berky+blackck&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313&_nkw=berkey+black&_sacat=0
Thanks so much!