The AquaFX White 300GPD RO/DI system is a high-performance water purification solution designed for saltwater aquarium enthusiasts who demand the purest water for their reef tanks. This robust system uses four stages of filtration, including premium sediment and carbon block pre-filters as well as a trio of USA-made TFC reverse osmosis membranes and mixed bed DI resin cartridges to produce zero-TDS water at an impressive rate of 300 gallons per day under optimal conditions. Key features include a high-flow booster pump, glycerin-filled pressure gauge, inline TDS meter with backlit display, and quick-disconnect fittings for easy maintenance and installation.