The Bulk Reef Supply 4 Stage Value Plus 75 GPD RO/DI System is a compact and efficient water purification unit specifically engineered for producing ultra-pure water essential for saltwater and freshwater aquariums. This system effectively removes impurities, chlorine, chloramines, heavy metals, and total dissolved solids (TDS) from your tap or well water, ensuring a pristine foundation for your aquatic environment. With a production rate of 75 gallons per day, it provides a reliable supply of high-quality water for mixing saltwater, topping off tanks, and general aquarium use. Key features include a pre-installed dual TDS meter for monitoring water purity before and after the DI stage, a glycerin-filled pressure gauge for optimal performance monitoring, and an automatic shut-off valve to prevent water waste. It also comes equipped with a flush kit, Mur-lok push-connect fittings for secure, leak-free connections, and 10 feet each of 1/4" blue, red, and black tubing for easy installation. The system utilizes NSF certified filters, including a True Gradient Technology sediment filter, a chlorine carbon block, a Dow Filmtec BW60-1812-75 RO membrane, and color-changing mixed-bed DI resin, all in standard 10 x 2.5 inch dimensions. This 4-stage RO/DI system is an excellent choice for reefers and aquarists whose source water is treated with low amounts of chlorine or relatively clean well water with minimal contaminants. Its self-contained design on a single bracket makes it ideal for tight spaces and offers easy, non-permanent installation using included faucet diverter valves or garden hose connections. Backed by a BRS Limited Lifetime Warranty, this system provides peace of mind and consistent, high-quality water for maintaining a thriving and healthy aquarium.