The Aquatic Life Classic RO/DI Unit 100 GPD is an essential system for any saltwater aquarium enthusiast seeking to produce pure, filtered water at home. This economical Reverse Osmosis system effectively removes harmful substances from tap water, including heavy metal ions and total dissolved solids, ensuring your aquarium receives only the highest quality water. With a robust output of up to 100 gallons per day, it provides a consistent supply of pristine water vital for the health and stability of your reef environment. This unit comes equipped with several user-friendly features designed for convenience and longevity. It includes a manual flush valve to extend membrane life, a clear micron cartridge housing for easy visual inspection, and an auto shut-off valve that conserves water by stopping flow when the outlet is closed. Setup is simplified with included wrenches for housing access, a garden hose adapter for faucet connection, and 0.25 inch Buddy-Fit Press Fit Connectors for secure plumbing. A 0-160 PSI gauge monitors supply water pressure, and 10 feet of color-coded polyethylene tubing assists with installation. The system includes a 1 Micron Pre-filter, Solid Carbon Block, Catalytic GAC, and a 100 GPD TFC Membrane cartridge, with an option to easily upgrade by adding a separate Deionization unit. It operates optimally between 60-100 PSI and 77°F, boasting a typical rejection rate of 1:4. The Aquatic Life Classic RO/DI Unit 100 GPD is an ideal choice for both novice and experienced reef keepers who prioritize water quality and seek an economical, reliable solution for their aquarium water needs. Its straightforward design, ease of maintenance, and included essential cartridges make it a great entry point for producing purified water. The built-in wall mount bracket and the ability to add an optional DI unit provide flexibility and room for future expansion, ensuring this unit remains a valuable asset to your reef keeping journey for years to come.