The PureZone Ceramic and Bacteria Cartridges are a cost effective solution for removing impurities like sediment, bacteria, cysts, bad taste, organics and heavy metals. The cartridges are effective at removing 99.99% of Cryptosporidium, E-Coli and others (spec sheet available). This cartridge is ideal in sites with no available power and UV is not an option. The cartridges can be cleaned/scrubbed to improve performance if it is under high sediment loading making it perform as new over the life of the filter.