Hydro Life filters containing KDF and carbon address many contaminants features bacteria, heavy metals, lime/scale formation, chlorine, taste, and odor. All this while lasting up to 4 times longer than typical carbon-only filters. Unlike competing filters, we tightly pack our filters forcing all of the water to interact with the media. This allows better water-to-media efficiency giving you much better performance. All these things combined equal unsurpassed quality in the water you depend on, providing clean, clear water like you've never had before.