BRS Universal CO2 Scrubber

BRS Universal CO2 Scrubber
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  • BRS Universal CO2 Scrubber
  • BRS Universal CO2 Scrubber

BRS Universal CO2 Scrubber

100% Recommend this to a friend (5 of 5)

SKU: 204179
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Quick Overview

Carbon Dioxide (CO2) can directly affect the pH of your aquarium, and with a low pH, corals may not grow as fast. Connecting a CO2 scrubber directly to the venturi on your skimmer along with CO2 absorption media you can control the amount of CO2 that is being sucked into your skimmer, effectively raising your tanks pH by removal of excess CO2.

Requires CO2 Absorbent Media (not included)


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Product Questions

What is the difference between this and the universal air scrubber?
Question by: Johnathan Lebsock on Jan 6, 2017 3:20:00 PM
Great question! The CO2 Scrubber utilizes 3/8" ports and tubing while the Universal Air Filter utilizes 3/16" connections and fittings. The larger tubing on the CO2 scrubber more closely matches most protein skimmer's air intake lines. :-)
Answer by: Randy (Admin) on Jan 11, 2017 6:11:00 PM
I purchased your co2 scrubber but the tubing is too big for my skimmer. what do I do?
Question by: Robert on Feb 25, 2017 12:45:00 PM
Hey there,
If you need a different size barb for your skimmer hose, we do sell various adapters located on this page which should fit your needs.

Have a great day!
Answer by: Zack (Admin) on Feb 27, 2017 5:06:00 PM
When ordering this product does the internal cartridge can be replace for a clear cartridge or not? A clear cartridge can affect the performance of the absorbing media?
Question by: Sergio on Jan 8, 2017 11:48:00 AM
Great question! Either refillable cartridge would work fine with the CO2 Scrubbing Media, without concern to the media's performance. We utilize both cartridges on a few tanks here at BRS with equal results. :-)
Answer by: Randy (Admin) on Jan 10, 2017 2:02:00 PM
Do you guys sells just the tubing? I can't seem to find it anywhere on the site.
Question by: Ryan Ernst on Jan 10, 2017 2:58:00 PM
Great question! We just recently started carrying this size of tubing and it will be available shortly on our site! :-)
Answer by: Randy (Admin) on Jan 11, 2017 3:58:00 PM

Full Details

CO2 is by far the number one cause to low pH in household aquariums. Ambient CO2 can vary from building to building and depending on your location it may not be practical to keep your windows open or pull fresh air from outside into the skimmer. By relocating your protein skimmer's air intake from the silencer over to the CO2 scrubber can actually increase your tanks pH by a couple points. Depending on the amount of ambient CO2 in the room it is not uncommon for tanks to raise from 7.8 pH up to 8.3 pH within a couple days but results can vary.



Connect the included 3/8" tubing to your protein skimmer's air intake. It is usually easiest to remove your skimmer's silencer and directly attach the CO2 Scrubber tubing your pumps venturi.

Unscrew the body from the head of the reactor and remove the refillable cartridge. Add 1 Tbsp of RODI water to the bottom of the reactor body making sure that it does not to touch the CO2 media when the cartridge is replaced. Completely fill the refillable cartridge insert with your preferred CO2 absorbing media and place back into the reactor housing.

Monitor your tanks pH hourly for the first couple days of use. When your pH starts to drop in value (usually 1-2 weeks*) you will need to replace the CO2 media. Most CO2 absorbing media will have a color changing indicator to let you visually see when it is depleted.


What's Included?

CO2 Reactor with 3/8” barbed fittings

6’ of tubing

10” refillable cartridge


CO2 absorption media sold separately



5 Items

  • WOW! By bavass on 4/4/2017

    very easy set up, PH went up and what surprised me was the added benefit that my skimmer is performing better to!
  • Co2 By Midtownman on 3/15/2017

    My ph would fluctuate between 7.6 to 8.0 since then I installed the c02 scrubber to my skimmer and my ph is at 8.3 my coral looks fuller and happy and I had it on for three weeks and the bottom and barely changing color
  • Excellent product By HG on 2/23/2017

    Used the BRS CO2 scrubber with the BRS soda lime. PH went from 8.01-8.29 within a couple hours and has remained stable for the past couple weeks since setting up. Soda lime still going strong with no signs of exhaustion
  • Great! By SteelPenguin on 2/16/2017

    I did not like constantly adding buffer to try and maintain PH. I finally got tired of the swing cycle, and decided to try a CO2 scrubber. I like the way this unit is tightly sealed so that all of the air passes through it before reaching my skimmer intake. I had a really difficult time raising and maintaining my PH above 7.9 to 8.0. Literally, as soon as I hooked this unit up, it started climbing. My tank is now at 8.22 PH with virtually zero effort on my part. I have only filled the unit once, and I tried the Two Little Fishies branded CDX, so far (3 days) no color change. I also purchased the BRS branded media...I will try it on the next fill.
  • Satisfied By Corey on 1/27/2017

    I've ordered 2 of these now. Both working well but for some reason the 2nd one came with a larger size tubing/slip adapter than the 1st one did. I managed to make it work with a Tunze 9001 but needed to buy some smaller tubing.