The Grow1 Inline Garden Water Filter features an inline, high-flow rate design utilizing KDF-55 media to reduce 99% of water-soluble heavy metals. KDF-55 media is especially efficient at removing chlorine, chlorinated hydrocarbons and, as previously mentioned, heavy metals like lead, arsenic, aluminum, mercury, and cadmium from water. Grow1 Water Filters may be used independently or to ultimately protect existing water filtration/purification systems. Included with each filter is a flexible hose protector which allows the hose to bend at sharp angles while still delivering your filtered water unhindered!