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Home > Aquarium Supplies > Filters & Filter Media > RO & Deionization > AquaticLife Twist-In 4 Stage Compact Reverse Osmosis/Deionization System
AquaticLife Twist-In 4 Stage Compact Reverse Osmosis/Deionization System
AquaticLife Twist-In 4 Stage Compact Reverse Osmosis/Deionization System
AquaticLife Twist-In 4 Stage Compact Reverse Osmosis/Deionization System
Additional sizes may be available!
Additional sizes may be available!
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*100 gpd 4-stage reverse osmosis/deionization unit for aquarium use
*Compact water purification unit removes more tap water pollutants
*Distinct twist-in cartridge design makes filter changes simple & easy

Space-saving 100-gpd 4-stage reverse osmosis (RO) and deionization (DI) unit takes a clever design twist to ease filter installation and maintenance. AquaticLife Twist-In 4 Stage Compact Reverse Osmosis/Deionization System, distinct from conventional RO/DI units that employ bulky difficult-to-maneuver canisters, utilize twist-in filter media cartridges that install directly onto the unit making filter installation and replacement simple, easy, and clean. Produce ultra clean, pollutant-free water for aquarium use and spend less time with cumbersome RO/DI unit upkeep.

AquaticLife Twist-In 4 Stage Compact Reverse Osmosis/Deionization System features "hinged", pivoting cartridge heads that tilt outwards to provide easy, crowd-free access to individual cartridges. Filter changes take 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 any cartridge!

STAGE 1 - Twist-In Sediment Filter Cartridge: Recommend replacing every 6 months. The first stage of your RO unit is a 5-Micron Sediment Filter that traps sediment and other particulate matter like dirt, silt and rust, which will affect the appearance of your water.

STAGE 2 - Twist-In Carbon Block Filter Cartridge: Recommend replacing every 6 months. The second stage of your RO unit is a Carbon Block Filter. The Activated Carbon in the filter reduces chlorine by up to 99% and conditions the water prior to the RO Membrane.

STAGE 3 - Twist-In RO Membrane Filter Cartridge: Recommended replacing every 1-2 Years. The RO Membrane reduces impurities known as Total Dissolved Solids (TDS) from the water down to 1/10,000 of a micron, reducing arsenic, lead, parasitic cysts, copper and more.

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.


  • Small footprint of the unit makes it easy to place under cabinets or in limited spaces.
  • Twist-In cartridges for fast and easy replacement of filter media.
  • Triple-sealed cartridges ensure trouble-free operation.
  • Compact design with pivoting cartridge heads is perfect for small spaces.
  • Mounting Brackets hold the unit securely while mounted in a convenient location.
  • Includes everything for installation: Tubing, Water Supply Connectors, and Drain Connector.

Dimensions: 12 x 4 x 13 inches
Minimum water pressure: 30 PSI
Suggested water pressure: 65 PSI
Maximum water pressure: 80 PSI
Optimal Water Temperature: 77°F (25°C)

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 Aquatic Life 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. Aquatic Life 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, Aquatic Life 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 Aquatic Life'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 Aquatic Life 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.

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