Katadyn CombiThe Katadyn Combi gives you a two for one package (active carbon and ceramic). Simple change to 1 stage operation (only ceramic without activated carbon stage). The tried and tested ceramic depth filter removes bacteria, protozoa and other disease causing agents. The micro organisms cannot pass through the mini pores of the filter ceramic (0,2 microns) because of their size (greater than 0,2 microns = 0,0002 mm). The output is approx. 1L min. and the