KDF Fluid Treatment’s patented KDF^® 55 Process Medium provides a highly effective means of removing chlorine from water in POE or POU applications. This high-purity formulation of copper-zinc alloy removes up to 99 percent of heavy metals from water using the redox process. KDF Process Media also control scale, bacteria and algae, even in hot water, are 100-percent recyclable and contain no chemical additives. http://kdfft.com/products.htm