This BevGuard® brand water filter contains a polyphosphate scale inhibitor anda 0.5 Micron compressed coconut shell carbon block that is certified for thereduction of Cyst such as Cryptosporidium, Giardia and Entamoeba. This filtercartridge reduces the accumulation of minerals that lead to hard water spotsfrom lime scale build up on equipment. The carbon block provides tremendouscapacity to reduce impurities and sediment that may be present in your drinkingwater. The carbon block has millions of active sites on its surface and within thestructure which can absorb impurities like a sponge, and can attract and holdother types of impurities to its surface like a magnet. Additionally, this filter cancatalytically breakdown other impurities very similar to the way a catalyticconverter works in your automobile. These processes ensure that you aregetting the cleanest and best tasting water possible.This economical filter will provide you with months of protection by reducinghard water build-up in any beverage or food equipment application.