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Single Stage DI Unit Add-On

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Product Code: AQ202
Availability: In Stock
$50.99 $55.99

DI Filter Add-On (Refillable) Ten Inch Model

The Aquatic Waehouse add-on DI filter housing come with a super handy "John Guess" pop-on tubing connections, a sturdy metal wall hanger, screws and a "color-changing" quality DI resin block that is ready to go!

The ion exchange process percolates water through bead-like spherical resin materials (ion-exchange resins). Ions in the water are exchanged for other ions fixed to the beads. The two most common ion-exchange methods are softening and deionization.

Softening is used primarily as a pretreatment method to reduce water hardness prior to reverse osmosis (RO) processing. The softeners contain beads that exchange two sodium ions for every calcium or magnesium ion removed from the "softened" water.

Deionization (DI) beads exchange either hydrogen ions for cations or hydroxyl ions for anions. The cation exchange resins, made of styrene and divinylbenzene containing sulfonic acid groups, will exchange a hydrogen ion for any cations they encounter (e.g., Na+, Ca++, Al+++). Similarly, the anion exchange resins made of styrene and containing quaternary ammonium groups. 

Cation and Anion resins (H+ and OH-) remove the remaining total dissolved solids (TDS) from membrane-filtered water.

These resins may be packaged in separate bed exchangers with separate units for the cation and anion exchange beds. Or, they may be packed in mixed bed exchangers containing a mixture of both types of resins. In either case, the resin must be "regenerated" once it has exchanged all its hydrogen and/or hydroxyl ions for charged contaminants in the water. This regeneration reverses the purification process, replacing the contaminants bound to the DI resins with hydrogen and hydroxyl ions.

Deionization can be an important component of a total water purification system when used in combination with other methods discussed in this primer such as RO, filtration and carbon adsorption. DI systems effectively remove ions, but they do not effectively remove most organics or microorganisms. Microorganisms can attach to the resins, providing a culture media for rapid bacterial growth and subsequent pyrogen generation. The advantages and disadvantages of this technology are summarized below.

Features:

   Cation and Anion resins (H+ and OH-) remove the remaining total dissolved solids (TDS) from membrane-   filtered water.

   10" standard cartridge size includes a top gasket for a secure fit.

   Cartridge housing shape lends itself to efficient water-to-resin contact.

Single Stage DI Unit 

This is one of the easest ways to convert a RO water filter system to a RO/DI. This unit comes with everthing needed to plumb in to an exsiting RO unit. The kit come with ten feet of water line, one canister unit, a refillable cartridge and DI resin.

How it works:

Deionization (DI) beads exchange either hydrogen ions for cations or hydroxyl ions for anions. The cation exchange resins, made of styrene and divinylbenzene containing sulfonic acid groups, will exchange a hydrogen ion for any cations they encounter (e.g., Na+, Ca++, Al+++). Similarly, the anion exchange resins, made of styrene and containing quaternary ammonium groups, will exchange a hydroxyl ion for any anions (e.g., Cl-). The hydrogen ion from the cation exchanger unites with the hydroxyl ion of the anion exchanger to form pure water.

These resins may be packaged in separate bed exchangers with separate units for the cation and anion exchange beds. Or, they may be packed in mixed bed exchangers containing a mixture of both types of resins. In either case, the resin must be "regenerated" once it has exchanged all its hydrogen and/or hydroxyl ions for charged contaminants in the water. This regeneration reverses the purification process, replacing the contaminants bound to the DI resins with hydrogen and hydroxyl ions.





* Easy-to-install add-on deionization filter for aquarium RO systems
* Water polishing DI stage produces ultra pure water for aquarium use
* Color-changing resin filter eases aquarium RO system maintenance

Easily convert any 3-stage reverse osmosis unit into a 4-stage RO/DI unit! Aquatic Warehouse Add-On Deionization (DI) Filter installs last in line of your existing reverse osmosis (RO) unit to remove additional contaminants and dissolved solids. Color changing DI resin slowly turns rust red/orange when exhausted or at the end of its useful life for simple visual confirmation of filter performance.

Aquatic Warehouse Add-On Deionization (DI) Filter is perfect for aquarium applications requiring pure water free of contaminants and dissolved solids. Use pure RO/DI water to mix synthetic salts for marine reef aquariums housing corals, anemones or other sensitive aquarium inhabitants. For applications demanding 18 megohm (ultra pure) water, the use of two DI units is strongly recommended. AquaFX Add-On Deionization (DI) Filter measures 4-1/2" dia x 11-1/2" high. Made in the USA.

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