Mon-Thurs 7am-5pm PST
Fri 7am-4pm PST

Questions about products, orders, shipping?
Contact us by call or email

Marine Depot KleanWater 6-Stage Economy RO/DI System - 100 GPD


Starting at $21/mo with . Learn more

Item #: MD9117

Ships Free!

Only 4 left - order now!

In Stock

Made in the USA!

We have assembled a high quality yet economical water purifying system that turns ordinary tap water into ultra-pure, zero-TDS, water for your aquarium. Harmful impurities such as nitrates, phosphates, silicates, pesticides, heavy metals are removed though filtration and absorption; leaving behind KleanWater as nature intended!

6-Stage KleanWater Economy RO/DI System Features
  • High Silicate Rejection TFC Membrane - 100 GPD
  • 1-Micron Sediment Filter
  • Two High-Capacity Carbon Block Cartridges with chloramine-removal capabilities
  • Two Nuclear-Grade Mix-Bed DI Resin Cartridges Ensures Zero TDS Water
  • Heavy-Duty Aluminum Mounting Bracket
  • Quick Connect Fittings
  • One-year warranty
  • Garden Hose Adapter
  • Filter Wrench for filter removal
  • 6’ of tubing for inlet and outlets
  • Instruction Manual
Note: A flush valve can significantly enhance the life of TFC membrane by flushing out any harmful impurity from the membrane.

Manufacturer information

Marine Depot was started in 1998 by a self-professed reef geek and pre-med student Ken Wong. Ken envisioned a one-stop shop where customers could find everything they needed, from technical product specifications, reef aquarium information, expert advice on the hobby and friendly one-on-one customer support. Having grown from a one-man crew to being one of the world’s largest suppliers of reef and marine aquarium products, this very core philosophy still lives strong in the Marine Depot culture 20 years later.

5 Stars


Reviewed on
September 28, 2017

Yes, I would recommend this.


This product seem to be the best at its price if you want the best rodi but don't want to spend money on extra pumps, gauges and such. Also you get 15% off replacement cartridges for life from this site!!! How crazy is that? And this is packed extremely well might I add. I do recommend that you buy a faucet to garden whose adapter from your local hardware store because this will only fit a standard spigot

Was this review helpful? 1 0


Reviewed on
May 20, 2017

Yes, I would recommend this.

As described

Pros: Easy to setup. Good instructions.

Cons: No TDS meter or pressure gauge

This product was easy to set up, came with detailed instructions. Setup time was about 1 hour including running the water through the stages as described in the instructions. One thing I wish this came with were the pressure gauge and the TDS meter.

Was this review helpful? 3 0

ricks reef

Reviewed on
August 04, 2016

Yes, I would recommend this.


I purchased this unit to make my life easier with top offs and water changes to my 90 gallon tank. It was easy to set up, and works great. This really makes getting great water quality easy.

Was this review helpful? 1 0

jeremy woods

Reviewed on
September 14, 2015

Yes, I would recommend this.

Pure Water!

This was actually a lot of fun installing and learning how it worked. While somewhat intimidating in looks, it's pretty easy if you take your time, read the instructions and watch the videos from Marine Depot. I ended up buying a meter to monitor the PPM (3 probe version) and a separate pressure gauge. Everything works great and I'm producing "Zero PPM" water from my over 500 PPM city tap water.

Was this review helpful? 1 0

etienne jaeckel

Reviewed on
August 27, 2015

Yes, I would recommend this.

RO/DI System

Works very well. Couldn't be happier. Excellent product.

Was this review helpful? 0 2

jamie myer

Reviewed on
February 11, 2015

Yes, I would recommend this.

Works well, enormous.

A great low cost filter. Taking my 379ppm water to 1ppm. That said, note the dimensions won't fit under-cabinet where many would like to mount.

Was this review helpful? 0 0

We use cookies to provide a personalized site experience. By continuing to use & browse this site, you agree to our Privacy Policy.