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RO Water Systems (Reverse Osmosis) & RO/DI Water Systems (Reverse Osmosis/Deionization)

15% Off All RO & RO/DI Replacement Filters for Life!
Aquarium Pharmaceuticals
Aquarium Pharmaceuticals Tap Water Filter
An easy-to-use, single-cartridge tap water filtration system that removes impurities from tap water, making perfect, deionized aquarium water.
AquaticLife
AquaticLife RO Water System
AquaticLife RO Buddie is a compact 3-stage RO unit that provides economical filtered water using sediment, carbon cartridges with a TFC membrane. Small footprint of the unit makes it easy to place under cabinets or in limited spaces.
Captive Purity
Captive Purity RO Water System
Engineered and manufactured under strict guidelines to produce extremely pure water with exceptional focus on minimizing phosphates and silicates.
Captive Purity RO/DI Water System
Engineered and manufactured under strict guidelines to produce extremely pure water with exceptional focus on minimizing phosphates and silicates.
Kold Ster-il (Poly Bio Marine)
Kold Ster-il Filter System
The Kold Ster-il® uses three separate stages to sorb heavy metals. It doesn't remove calcium, magnesium divalent cations nor strip the water's alkaline reserve. Kold Ster-il's filtrate meets or exceeds ANSI/NSF Potable Water & FDA Bottled Water Quality Standards.
Seachem
Seachem RO/DI Water System
Pinnacle and Pinnacle+ RO units use the highest quality components available and feature modular design to ensure easy accessory add-ons.
Spectrapure
Spectrapure RO Water Systems
Produce contaminant-free water using a two- or three-stage RO unit from SpectraPure. These systems reject ionic, organic and particulate impurities and feature high-flow TFC membranes to produce water of the utmost quality.
Spectrapure RO/DI Water System
For laboratory-grade, purified water, look no further than SpectraPure's line of RO/DI systems. Water molecules are forced through the RO membrane leaving salts, hardness, bacteria, viruses, pyrogens and other impurities to be flushed from the system.
Tunze
Tunze RO Station Water Filter System
A high-quality reverse osmosis unit used to produce pure water for marine and fresh-water aquariums. Features a unique rinsible 20 µm sediment trap and attractive metallic blue finished aluminum bracket. Made in USA!
Replacement Filters, Installation Accessories, & Add-On Kits
Accessories & Add-On Kits
Find all the components needed to customize your RO system, such as Level controllers/shut off kits, booster pumps and drinking water kits.
Add-On Components (Float Valve Kit, Shut Off Valve Kit, etc.)
Includes items such as Float Valve Kit, Shut Off Valve Kit, flush kits and TDS meters.
Replacement Filters (Sediment, Carbon, DI, TFC)
When it is time to change your RO-DI filters, you will find all the replacement cartridges needed including sediment, carbon, DI and RO membranes.
Water Testing
TDS meter and chlorine test kit to test your RO/DI water. Helps let you know when it is time to change the cartridges.
Replacement RO Fittings
Jaco Fittings
A wide variety of fitting mainly used for plumbing RO type tubing.
JG SpeedFit Fittings
A wide variety of fitting mainly used for plumbing RO type tubing.
Mur-Lok® Fittings
Mur-lok® Polypropylene fittings and tubing for Reverse Osmosis Systems.
Shut-Off Valves/Ball Valves
Valves that will shut off the flow of water through RO tubing.
RO and RO/DI water systems remove impurities—chlorine, chloramines, pesticides, phosphates, heavy metals and many others—from tap water. These impurities may contribute to the growth of nuisance algae, while others can cause even larger problems.

DI (De-Ionizing) cartridges do an excellent job of removing phosphates, silicates and nitrates from tap water. They are highly recommended for reef tanks but work just as well for fish-only tanks.

There are a ton of installation accessories available for RO and RO/DI units, probably the most useful being a drinking water kit. Our top selling brands are Captive Purity, SpectraPure and Kent Marine.

Other tap water filtration systems are available, too, such as the Aquarium Pharmaceuticals Tap Water Filter and Poly Bio Marine Kold Set-il Filter System.

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