Insure the health of your fish by providing them with clean, healthy water! Pure-Flo II TFC R.O. systems will purify 24 gallons of water per day, removing up to 98% of disease-causing contaminants. A 1-micron sediment and carbon block pre-filter will ensure the purity of your water as it passes through the TFC membrane which removes even the tiniest of microscopic dissolved substances. Also available with a special Deionization canister (built-in or as a single unit sold separately) which will post-filter any minute amount of remaining impurities, providing the absolute purest water possible, 99% pure! Protect your aquarium investment from those invisible contaminants with a Pure-Flo II R.O. system. For use on chlorinated or non-chlorinated water sources. Instructions: **NOTE: DISCARD FIRST 10 GALLONS OF WATER PRODUCED** Ideal water conditions: Water pressure: 60 PSI Water temperature: 69-78 degrees F. Membrane installation: Unscrew nut on elbow fitting and remove water line. Unscrew membrane housing cap. Insert membrane into membrane housing. Replace membrane housing cap. Canister removal: Slide canister wrench over cartridge canister. Turn wrench to loosen canister. Remove cartridge canister. Flush carbon block cartridge with tap water for a minimum of 5 minutes before use. Plumbing hook-up: Attach inlet for source water to chlorinated or well water supply (yellow tube). NOTE: to attach directly to your faucet, attach the faucet adaptor to the inlet for source water. Route wastewater outlet line to drain (white tube). Z Route purified water outlet line to storage container (blue tube). Make sure all plumbing fittings and membrane housing cap are screwed down tight. Plug in the pump. Prefilters should be replaced every 6 months or 3000 gallons, membrane should be changed once a year. Specifications: 3 gallons waste water to 1 gallon production water Maximum Total Dissolved Solids (TDS) in source water less than 250 ppm Membrane type: TFC (Thin Film Composite) Rated Gallons Per Day: 24 Inlet for source water: 3/4" garden hose connection with faucet adaptor and 3/8" pressure tubing Tubing type: 1/4" pressure tubing Size: 14.25" x 6.5" x 15.5" Warranty: Unit has a 1 year warranty against defects in material and workmanship.