The Pure Fill Hot Tub and Spa Garden Hose Fill Filter makes starting up your spa a snap! The Pre-Filter utilizes Activated Carbon for the removal of TOC's, VOC's Chlorine By-Products and Suspended Solids. Features: Filters 99% of Contaminants and Suspended Solids Food Grade Activated Carbon (0.5 Micron Carbon Block for Removing Chemical Contaminants, Algae, Mold Spores, Bacteria and Organic Debris) Reduces and Removes Metals (Contains Metal Removing Resins) Connects to a Standard Garden Hose. (Hose connections on both ends) The Fill Filter is Great for Aquariums, Decorative Ponds, Camping or RV'ing. Saves Money at Start Up Crystal Clear Water Filters 1200 Gallons of Water (Three to Five Hot Tub Fills) Directions: Connect to Garden Hose Flush filter for 30 Seconds Fill Spa, then store until next use This filtration device connects to a standard garden hose. The water input receives a male end garden hose connector. The filter is food grade activated carbon and is resin impregnated for heavy metal mitigation.