Carbon Filter: Activated carbon, a porous substance with the strongest adsorption forces, has the highest volume of adsorbing porosity of any material known to mankind. By carbonization and activation, activated carbon can be made from many substances containing high carbon content such as coal, wood, bamboo and coconut shells. Superior activated carbon displays its performance by the features of specific surface area, adsorption capability, mechanical strength, thermal and chemical stability. Activated carbon filters are widely applied in industrial process and civil use as the most efficient method of removing odors, chlorine, volatile organic compounds (VOC) , colors, tastes and other contaminants from fluids.