Matrikx 4 Stage RO/DI Replacement Filter Kit

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Matrikx 4 Stage RO/DI Replacement Filter Kit

97% Recommend this to a friend (67 of 69)

SKU: 200104

reg. $22.99

Special Price: $19.54

In Stock: 1,163
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Quick Overview

This kit works with all BRS 4 Stage RO/DI Systems along with most other RO/DI systems that use 10" canisters.

This kit includes:

  • Purtrex 5 Micron Sediment Filter

  • MATRIKX CTO 5 Micron Carbon Block

  • 1.25 lb. Color Changing DI Resin Refill

We recommend changing sediment filters when they become visually dirty or there is a noticeable drop in pressure. Change carbon blocks every 6-12 months depending on use. This kit does not include a membrane filter as they need replacement every three years or so, depending on water and set up.


Full Details

Recommended Installation for this package*

  • Stage One - Purtrex 5 Micron Sediment Filter
  • Stage Two - MATRIKX CTO 5 Micron Carbon Block
  • Last Stage - DI Resin

Our filter kits feature some of the most widely used and trusted brands in the world including GE, KX Technologies and Pentek. The 10” filter size is the industry standard and will fit our systems as well as virtually every brand of RO system that uses similar looking carbon blocks.  Most of the filters included in our kits are NSF Certified or WQA Gold Seal Certified and Manufactured using FDA-compliant materials.

*This is our recommended filter arrangement and we have found to be the best combination for the most common installations and water conditions. If you have something unique about your water supply or installation please contact customer service and one of our WQA certified water specialists will be able to assist you. Our onsite chat feature is the quickest way to receive advice but we are available to assist via the phone and email as well.


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  • GREAT RO/DI REPLACEMENT KIT By Henhen on 9/13/2017

    Easy to use and works like a charm!
  • 4 Stage ro/id By Zombiestricker on 6/20/2017

    work very good
  • Easy to install, works well By C2l2parker on 2/7/2017

    Products work as advertised, easy to install, and nice of BRS to package them together!
  • Perfect fit! By Rick on 6/29/2016

    Easy replacement filter and resin! It's a "no brainer"!
  • simple to install By orlando_Jeff on 1/18/2016

    Direct replacement for my 4 stage system. Easy to install. I replace these once a year
  • 12/28/15 By gerloba on 12/28/2015

    I would recommend this product works really well on me brs has the best and quality in produc A+++++++++
  • Use By Rob on 12/11/2015

    Complete drop in replacements!
    Up and running in 20 minutes.
  • Great Product By Frank on 4/26/2015

    I really am pleased with the filters and resin that I have purchased fro BRS. The price is spot on and shipping is dependable. I always buy an extra to keep one on hand.
  • super simple! By KT on 3/22/2015

    Plug and play! Super easy to replace the filters in my ro/di other way to buy filters!
  • good price By Adam on 2/4/2015

    Good price great replacement filters
  • AWESOME PRODUCT! By Josh on 1/17/2015

    Bought one of these several months ago, finally starting to show signs of needing replacement. I do weekly water changes, and am just now starting to see tds. Long lasting filters and DI resin!
  • Great By daniekor on 1/13/2015

    Very easy to do with no guess work.


Ask a question

Product Questions

I ordered a 4 stage replacement filter kit and got the bag of stuff. Where does it go? I dont have a cartridge that opens and lets me fill it with anything
Question by: Joe on Oct 23, 2013 10:12:00 AM
Hi Joe,
Do you have our 4 stage RO/DI filter system? If so, the last stage to the right is the DI stage. When you remove that canister the bottom will screw off the cartridge inside of it allowing you to replace the resin.
Answer by: Bulk Reef Supply on Oct 23, 2013 10:12:00 AM
Will these cartridges work to replace filters on a Coralife Pure-flo II 50 gpd system?
Question by: Brad on Nov 7, 2013 9:21:00 AM
Hey Brad,
Our filters are universal 10" filter sizes that will fit almost any unit on the market (including the Coralife). Keep in mind that we package our DI resin in vacuum sealed bags to be used with refillable cartridges. If your DI cartridge isn't refillable youll want to pick up a refillable one the first time as well (sku 200002).
Answer by: Bulk Reef Supply on Nov 7, 2013 9:21:00 AM
I upgraded my 75 GPD RO/DI unit to 150GPD. I recently purchased replacement filters due to seeing green algae inside the filters and housings. I changed out and rinsed out as much as I could when changing filters and DI resin. However, I am seeing more algae starting to show again. I took ALL filters out and ran some clorox water thru the system, then flushed it with clean clear water. My system is located under a deck outside my laundry room. It gets no direct sun. What can I do to stop the algae? Should I drain the filter canisters when not using it? I ran clorox thru since I figured the 1/4 tubing maybe have algae contamination.
Question by: jeffrey on Sep 6, 2014 3:22:00 PM
Hi Jeffrey,

Even though your system may not be getting direct sun it is still receiving enough light to support algae. I would place it in a cabinet or cover the canisters to completely shield it from the sun. This should be enough to prevent algae growth.

Running bleach through the system should kill any algae spores but it will also damage your RO membranes and quickly exhaust your carbon filters which are now likely contaminated with algae. Its also possible that your tap water contains enough algae to contaminate your system so this could be a never ending battle in your current situation.

Before running any more bleach through the system I would try the first solution and go from there.

I hope this helps!
Have a great day :)
Answer by: Bulk Reef Supply on Sep 6, 2014 3:22:00 PM