The filter cartridges have superior taste and odour reduction capabilities. There are two types of media in these types of filters: The KDF media in this cartridge specializes in the reduction of inorganics, heavy metals, and chlorine and the granular coconut shell activated carbon reduces organic compounds. This unique, innovative and environmentally responsible media consists of high purity copper-zinc granules that use redox (the exchange of electrons) to effectively reduce/remove contaminants without the use of chemicals. This is an excellent choice if you are looking for a filter that will reduce a wide range of contaminants and can be effectively used as either a pre or post filter. The KDF media controls scale, bacteria, and algae. KDF media causes cellular damage to microbiological organisms which reduces bacterial growth and protects the activated carbon from fouling to extend the life of the filter.