Katadyn Combi - This filter combines a silver impregnated ceramic element with active carbon cartridge. The Combi eliminates bacteria and protozoa as well as reducing smells and odours. - Filtering speed: approx. 1 liter / minute - Ceramic filter capacity: approx. 50 000 liters, depending on water quality Katadyn is a leading forerunner of water purification. Its water filters and purifiers are used in a variety of conditions and situations. Don't allow your filter to freeze. Water expands as it freezes and may break the filter element. *Note!* A water filter or purifier tablets cannot remove the toxins created by algae bloom, and therefore do not make water containing said toxins safe to drink.