If you’re running a reef tank and need ultra-pure water without complicated plumbing, the BRS 4 Stage RO/DI System is a reliable and efficient solution. Ideal for homes with municipally treated chlorine water or relatively clean well water, this compact unit mounts neatly on a single bracket — perfect for tight spaces or areas where a non-permanent connection is preferred. At reefsupplies.ca we understand reef keepers need dependable, easy-to-install water filtration. This system installs in just minutes and requires no permanent modifications to your home or plumbing. 4 Stage Plus RO/DI System Features Dual inline TDS meterGlycerin-filled pressure gaugePre-installed automatic shut-off valvePre-installed flush kitMultiple source water connection optionsDedicated drain/waste water connectionsMur-lok push-connect fittings with dual EPDM O-rings10 ft each of 1/4" blue, red, and black tubingPre-installed NSF Certified filters 4 Stages of Filtration Stage 1 – Purtrex 5 Micron Depth Sediment Filter (NSF Certified) This true depth sediment filter captures rust, dirt, and suspended particles before they reach your carbon block and membrane. Its graded density design tightens progressively as water flows through, increasing efficiency and extending filter life. Stage 2 – BRS 5 Micron VOC Carbon Block (NSF Certified – Chlorine 15,000 @ 1 GPM) Engineered to remove chlorine and volatile organic compounds (VOCs) from municipal water supplies. This stage protects the RO membrane and improves overall system performance. Stage 3 – 75 GPD Dow Filmtec RO Membrane (NSF Certified – Up to 99% Rejection Rate) The 75 GPD Filmtec membrane removes up to 99% of dissolved contaminants from standard household water. It operates efficiently at just 50 PSI of feed pressure, delivering strong rejection rates without excessive pressure requirements. Stage 4 – Nuclear Grade Color-Changing DI Resin The final polishing stage reduces water down to 0 TDS. The mixed-bed DI resin features a color-changing indicator, shifting from dark blue to gold as it becomes exhausted, helping you monitor when replacement is needed. This 4 Stage RO/DI system provides the consistent 0 TDS water your reef aquarium requires for mixing saltwater and topping off evaporation.
