Reverse Osmosis RO and RO/DI Systems A Reverse Osmosis System also called a RO/DI system, is not only sensible, it is a primary step toward keeping your saltwater aquarium healthy. By removing more than 99% of all dissolved solids with reverse osmosis membranes and color changing DI resins, Reverse Osmosis systems ensure that your reef's habitat enjoy the healthiest, cleanest water possible. Say good-bye to algae, phosphates and other harmful minerals and deposits that damage your fragile marine life environment. Your reef and saltwater fish will show high quality growth and vitality!  Learn About Aquarium Water Quality Here  Looking for an Aquarium RO System - Very Important Reading    Aquatic Connections Multistage Reverse Osmosis RO/DI Systems Aquatic Connection recognized the need for a better built RO/DI system and contacted one of the industry leaders in the production of high quality reverse osmosis and deionization (RO/DI) units that would be exclusive to us. Aquatic Connection Live Reverse Osmosis units are built using the finest components available. Aquatic Connection Live units use only DOW filmtec membranes, the Dow membrane is the finest filtration membrane found worldwide. All systems are manufactured in the USA and fitted with no rust aluminum brackets (not steel or plastic), built with quick disconnect color coded fittings, include all cartridges, membranes, installation kit, and color coded tubing. In our experience the best RO Systems for the money! Click to see all the Aquatic Connection RO Systems     Coralife Pure-Flo II RO Systems Coralife Pure-Flo II RO Systems produce clean, pure water from chlorinated or non-chlorinated source water. Premium Thin Film Composite (TFC) units remove up to 99% of hardness, heavy metals, toxins, and many other impurities. The Coralife Pure-Flo II units include clear filter canisters, cartridges and faucet attachments. Economical and easy-to-use, all units are wall mountable. By simply reversing the two outlet fittings, the units can be flushed without a flush kit. 4-stage RO/DI unit with mixed-bed resin deionization cartridge removes any additional impurities to produce 99.9% pure water. Pure-Flo II with integrated diaphragm pump increases water pressure to maximize production. Units with diaphragm pump are highly recommended for areas with low water pressure. Great for Freshwater or Saltwater Aquariums. Click to see all the Coralife Pure Flo II RO Systems