AquaCera W9512500 CeraUltra is a four stage ceramic filter cartridge combining the highly efficient filtration properties of ceramic with the enhanced water treatment properties of activated carbon and the heavy metal reduction capabilities of ion exchange media. Fits Doulton HCPS, HIP and HIS systems.  First Stage: The first stage consists of AquaCera Cerasyl Ceramic which provides genuine sub micron filtration. The cartridge reduces fine particulate matter, bacteria, cysts and turbuyity. Second Stage: The incorporation of silver locked within the ceramic structure gives enhanced bacteriostatic and self sterilizing properties. Third Stage: An inner core of activated carbon block reduces chlorine, chloramines, and organic compounds. Fourth Stage: Ion exchange resin reduces Lead and other heavy metals. Cleanable filter elementRecommended flow rate: 0.3 - 0.5 gpmFits AquaCera and Doulton housingsRemoves suspended solids, pathogenic bacteria, hydrogen sulphide, and leadImproves tastes and reduces trace contaminantsFour filtration stages within a single candleFiltration efficiency of > 99.99% at 0.9 micronsFiltration efficiency of > 99.9% at 0.5 to 0.8 micronsHighly efficient bacteriological filtrationTested with live cryptosporidium to a removal efficiency 100%Tested with live E.coli