Aquacera 9" CeraMetix Ceramic/Fluoride Filter For Gravity Filters Pathogenic bacteria99.9999% (ALcontrol Laboratories) Cholera, Typhoid, Salmonella, E. Coli, Fecal Coliform -Cysts100% (ALcontrol Laboratories) Cryptosporidium Parvum, Giardia Lamblia Sediment100% absolute to 0.5 micron (IBR Laboratories) Fluoride &gt;97% The CeraMetix GF filter is manufactured to remove suspended solids, pathogenic bacteria, cysts, organic chemicals and improve taste and odor The Aquacera CeraMetix will also fit in the Berkey and Doulton gravity filters and most others Filtering Capacity is 900 gallons depending on water quality