Inhibiting the growth of trapped bacteria and microbes within the filter, the PRISM antimicrobial spun depth cartridge prevents premature blocking from biofilm, the occurrence of unpleasant smells and the potential of unsightly water stains by utilising silver ions with antimicrobial properties. Primarily used in private water supplies such as boreholes and well water, the DSPPB is also an excellent safe guard for more critical prefiltration applications such as pre-UV treatment.