Aquarium Reef Reverse Osmosis & Deionization System w Manual Flush 75 GPD.

• Type:Reverse Osmosis Unit, Model:FH2INRODI
• Water Type:All Water Types, Mpn:FHRODI2IN75
• Brand:Fountainhead Water Systems

• Color: White
• Manufacturer: Fountainhead Water Systems

AQUARIUM/REEF  REVERSE OSMOSIS WATER FILTER SYSTEM WITH MANUAL FLUSH VALVE
DI Resin is necessary to reduce Total Dissolved Solids (TDS) to zero and is the last stage of an RO/DI unit. It is unnecessary to use the expensive proprietary DI cartridges that other RO manufacturers sell. Simply buy a refillable DI cartridge and fill with DI resin. You'll save money and get the same results. 
A constant supply of high purity water can be obtained by using two cartridges in series and allowing the first cartridge to completely depleted. During this operation, the second cartridge ensures that the water leaving the system is of the highest purity. New cartridges are placed into the polishing position and the remaining cartridge is put into the “roughing” position. This ensures complete utilization of all the exchange capacity, which lowers operating costs while increasing average quality.
The clear cartridges are refillable, so you can save with buying media in bulk, and using the inline cartridges again, and again.
75 GALLON PER DAY SYSTEMS  (6 STAGE)
1ST STAGE 5 MICRON SEDIMENT FILTER 2ND STAGE GAC Water Filter 3RD STAGE 5 MICRON CARBON BLOCK WATER FILTER 4TH STAGE 75GPD MEMBRANE 5TH STAGE MIXED BED DI FILTER  WHITE  INLINE HOUSING 6TH STAGE MIXED BED DI FILTER  WHITE INLINE HOUSING COMES WITH ONE CLEAR HOUSING PRE FILTER 1ST STAGE SEDIMENT. 2 WHITE HOUSING 1 GAC FILTER 1 CARBON BLOCK FILTER 1 AUTOMATIC SHUT OFF VALVE 1 FILTER HOUSE WRENCH FEED WATER Adapter
COLOR CODED FOOD GRADE TUBING ONE INLINE BALL VALVE CHECK VALVE ON THE MEMBRANE HOUSING.MANUAL FLUSH VALVE