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BIG BLUE 4.5 X 20" KDF55/GAC Coconut Shell WATER FILTER/CARTRIDGE.
REDUCES chlorine taste and odor, water-soluble heavy metals, and controls scale, bacteria, and algae in your water.
KDF is a patented medium that consists of high purity copper-zinc granules that use redox (exchange of electrons) to effectively reduce chlorine and heavy metals as well as controlling microorganisms in potable water.