The GroGreen Filter has a customized flow restrictor allowing ideal contact time with filtration media to maximize the reduction of chlorine, sediment, rust, silt, mercury, lead and PCBs (organic chlorine). It will help protect beneficial bacteria to invigorate organic compost, soil amendments, and bio-teas. Easily attaches to your garden hose with 11,000 Gallon Capacity (30 GPD = 365 days), up to 2 GPM. KDF85/Granulated Catalytic Activated Carbon removes up to 99% of chlorine and chloramines.