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MD KleanWater 4 Stage Advanced RODI Filter

Table of Contents

I) Overview

At the time of writing (2020), the Marine Depot KleanWater Advanced 4-stage RO/DI filter costs just around $200.  With decent water pressure, it can make up to 100 gallons per day of purified water. There are four different options available, from 4-stage to 6-stage, so it will really depend on your budget, your water source, and how many gallons you need to make.

II) Inside the Package


  • Garden Hose Adapter
  • Filter Wrench for filter removal
  • 6’ of tubing for inlet and outlets
  • Instruction Manual

III) Specifications

Marine Depot has 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!

4-Stage KleanWater Advanced RO/DI System Features:

  • High Silicate Rejection TFC Membrane – 100 GPD
  • 1-Micron Sediment Filter
  • High-Capacity Carbon Block Cartridge with chloramine-removal capabilities
  • Nuclear-Grade Mix-Bed DI Resin Cartridge
  • Pressure Gauge to Monitor Pre-Filter Performance
  • TDS Monitor to Measure System Performance
  • Manual Flush Valve Kit to extend TFC Membrane Life
  • Heavy-Duty Aluminum Mounting Bracket
  • Quick Connect Fittings
  • Made in the USA!
  • One-year warranty

IV) My Take

I’ve owned an RO/DI unit for over five years now.  In fact, it was one of the first purchases I made.  To put it simply, it’s not a sexy item, but it’s the best money I’ve spent in the hobby.  

I’ve never once had to lug buckets back and forth from my LFS.  I’ve never once ran out of RO/DI water.  I’ve never once worried that my water was anything less than 0 TDS.