AquaticLife Twist-In 4 Stage Compact Reverse Osmosis/Deionization System or AquaticLife Twist-In Dual Deionization Filtration Unit. AquaticLife Twist-In Mixed Bed Color Changing Resin Deionization Filter Cartridge installs directly onto your AquaticLife Twist-In DI or RO/DI unit in only seconds with just a quarter turn and without contact with used filter material. Best of all, the supply water to the unit does not have to be turned off to replace cartridge! Produce clean, pollutant-free water for aquarium use and spend less time with cumbersome DI unit upkeep.

STAGE 4 - Twist-In Mixed Bed Color Changing Resin Deionization Cartridge:
Replace filter when resin changes color completely to amber. After the water is filtered by the RO Membrane there is usually a small amount of Total Dissolved Solids (TDS) left in the water. In certain non-drinking water applications, it is important to remove the remaining TDS from the water. This is accomplished by filtering the water through a deionization (DI) resin filter that is charged with Cation and Anion resins (H+ and OH-). As the resin absorbs the TDS, it will change color. When all resin has changed color, it is time to replace the DI filter. Because the process of filtering the high quality water takes time, it is common to use a storage tank to collect filtered water, making it available on demand.

Specifications
Cartridge Dimensions 2.75" diameter x 11.00" high

About AquaticLife
AquaticLife manufactures an assortment of aquarium and gardening equipment and supplies; including light fixtures, RO/DI systems, pumps, skimmers and filter media. Its owners, David Troop and Michael Elliott have been in the aquarium industry and keeping aquariums for over 40 years combined with experience in retail sales, aquarium maintenance, marketing, product development and manufacturing.

The AquaticLife product debut was in September 2008 at the Super Zoo tradeshow in Las Vegas, NV. AquaticLife continues to exhibit and introduce new products each year. Product development is guided by comments and suggestions from retailers and hobbyists who use AquaticLife products.

AquaticLife products are available in stores across North America. AquaticLife only sells products to resellers, which makes their products more readily available to hobbyists. AquaticLife is a big enough company to meet their customers' demands on time, but small enough to provide customer service that is unmatched in the industry.

Since opening their doors in 2008, AquaticLife has added Talent that complements David and Michael; enabling the company's growth and success. The AquaticLife Customer Support Team answers customer questions and monitors the pulse of the online communities and aquarium clubs. Edward Jimenez assures that every product going out the door meets AquaticLife's highest quality standards while Diane Gonzales works with their customers to ensure orders are accurately processed and shipped on time.

Many more people keep AquaticLife operating and growing on a daily basis and serving their customers is truly a team effort. Hanging in the front lobby of the AquaticLife offices is our company mantra:

P e o p l e
Talent; describes our team members as individuals and as a collective.
Customers; supported and they are our loyal followers.
Hobbyists; validate that we know the pulse of the market.

P r o d u c t s
Innovation; keeps us ahead of the competition.
Quality; what our customers deserve and expect.
Availability; translates into reliability.

P r o f i t a b i l i t y
Sales; reputable practices with prices the market will bear.
Expenses; the responsibility of everyone.
Growth; fueled by our Talent.

Why Choose AquaticLife?
AquaticLife offers the most innovative aquatics products on the market today; delivering quality and customer satisfaction. AquaticLife encourages everyone to visit blogs and read user reviews about their products, ask your local store about their products and contact their Customer Support Team with any questions before making your purchase. The goal of AquaticLife is to make sure your experience is the best possible and they will only refer you AquaticLife products if they are a fit your specific needs. AquaticLife offers some of the best warranties in the industry, topped only by their Lifetime Repair Guarantee on all AquaticLife light fixtures.