The purpose of the reverse osmosis water filter systems is to produce water safe for the aquarium by removing chlorine, nitrates, phosphates and other contaminants from your home's tap water. By using a RO DI system from BulkReefSupply.com, you can produce zero TDS water to ensure the health of the tank's inhabitants and prevent algae growth. Deionization and reverse osmosis systems provide the best reef aquarium filtration available. We build our reverse osmosis/deionization systems from the best parts and exclusively feature American made DOW, MATRIKX and Purtrex filters. We also use American made Mur-lok dual EPDM O-ring fittings whenever possible on all of our RO DI units.

BulkReefSupply.com carries several RO/DI models in our Standard systems line to meet the needs of your saltwater aquarium set up. Check out our Standard RO Systems Quick Compare to see filter set up and features including our 5 Stage PLUS (makes 75 GPD), 5 Stage Water Saver (makes 150 GPD) and our 5 Stage SPARTAN (makes 300 GPD).