This fits your .

 Five Stage RO/DI Aquarium System with 75 GPD Membrane. 2x10" DI REFILLABLE Color Changing Media Cartridge. Manual Flush Valve. ALL CLEAR HOUSINGS.

Reverse Osmosis systems, combined with A DI after filter, will give you the lowest TDS reading for your aquarium water supply. 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 processing high quality Reverse Osmosis water through a final DI polisher to remove remaining ions. A manual valve will allow you to flush the membrane periodically to prevent TDS creep.

The clear DI cartridges are refillable, so you can save with buying media in bulk, and using the cartridges again, and again.



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RO/DI Aquarium Reef System 5 Stage Clear Single DI Manual Flush Valve 75 GPD - B01HOJ5AXQ