AquaCera CeraMetix 7" Filter Replacement Filter CeraMetix is the most advanced ceramic filter available. Utilizing AquaMetix core technology to offer the reduction of aluminum, arsenic, cadmium, chloramines, chlorine, cysts, fluoride, lead, mercury, nickel, radionuclides, silver, tri-halomethane, VOC's and zinc in a single, revolutionary ceramic filter element CeraMetix elements are available for use in both pressurized and gravity filter systems, filters for gravity use are designated as CeraMetix-GF and utilize a granular form of AquaMetix The AquaCera CeraMetix 7" filter is the most advanced ceramic filter available