The Bulk Reef Supply 7 Stage PRO Plus RO/DI System is engineered to produce up to 200 gallons per day of ultra-pure, 0 TDS water, providing the perfect foundation for a thriving reef aquarium. This comprehensive filtration unit is designed for maximum efficiency, effectively removing sediments, chlorine, chloramines, and a wide array of dissolved solids from your source water. Its robust construction and thoughtful design ensure a consistent supply of pristine water, essential for mixing saltwater and for automated top-off systems, safeguarding your tank's delicate inhabitants from harmful impurities.

This system features seven distinct stages of purification for unparalleled performance and DI resin longevity. Filtration begins with a 1-micron sediment pre-filter, followed by two 1-micron universal carbon blocks. Water then passes through two parallel Dow Filmtec 100 GPD reverse osmosis membranes, which work together to achieve a highly efficient 1.5:1 waste-to-product water ratio. The final three stages consist of separate Pro Series cation, anion, and mixed-bed deionization resins, a configuration that dramatically extends the life of your DI media. Included upgrades like an inline triple TDS meter, a glycerin-filled pressure gauge, and a membrane flush valve provide total control and monitoring of the purification process.

Ideal for the serious reef aquarist with larger tanks or those contending with challenging source water, this PRO Plus system excels where others fall short. If your tap water contains high levels of chloramines, phosphates, ammonia, or CO2, the specialized three-stage DI configuration specifically targets these impurities, preventing rapid resin exhaustion and reducing long-term operating costs. It is the ultimate solution for hobbyists who demand the absolute purest water and want a reliable, cost-effective system built to last a lifetime.