Aquarium Co-Op CO2 Regulator

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  • Dual Stage CO2 Regulator
  • Precision Needle Valve and Bubble Counter
  • Expandable Manifold for Up to 6 Aquariums
  • 1-Year, Hassle-Free Aquarium Co-Op Warranty

Grow aquatic plants faster by injecting pressurized carbon dioxide in your planted aquarium. Using the Aquarium Co-Op CO2 regulator will ensure a steady and reliable release of CO2 gas as it features a dual stage design. The two easy-to-read gauges show both tank volume and working pressure. Included is a bubble counter for easy adjustments of CO2 levels as well as a solenoid valve which can be plugged into a timer for precise timing of CO2 release.

Multiple manifold blocks can be added to this regulator to expand your CO2 system to multiple aquariums at once. Each manifold block features its own bubble counter for precise adjustment of gas to each aquarium individually.

Download Manual

Customer Reviews

Based on 30 reviews
Jay (Seattle, WA, US)
Reliable CO2

I had been waiting on switching to pressurized CO2 and finally went for this regulator after a lot of research. I try not to spend a lot of $$$ on aquarium supplies (haha) but this is so worth it. Easy to set up, easy to adjust, great instructions in the package and online. The plants are pearling and now I want to get another manifold to add on a second tank!

Ray B. (Philadelphia, PA, US)
Excellent product and service

As a long time CO2 DIYer I decided to give the real thing a try. Confident because of past experience with Aquarium Coop I ordered the regulator. I’m really glad I did. It works great! I had a little trouble setting it up but Aquarium Coop customer service is the best. Thank you again Cory and your staff for everything you do. A special shout out to Robert at Cust Service! Thank you.

Andre G. (California, CTT, TT)
CO2 Regulator

I Ordered this product and it came very fast, Straight out of the box is felt great and look great. Assembled it to my CO2 tank and there was no leaks. Bubble counter adjustment is steady when you set it with no driffs. I would recommend this product to anyone.

Dave H. (Royal Oak, MI, US)
Excellent product and value

After doing quite a bit of research, I ended up going with Aquarium Co-Ops CO2 setup, I am so glad that I did. The helpful Youtube video setup instructions made this a breeze to setup. I was intimated about adding CO2 for the longest time, thinking I would **** it up, but man this is simple. Also arrived ridiculosity fast from the other side of the country.

Michelle D. (Nederland, CO, US)
Co2 regulator

Working great. I was getting nowhere fast trying to grow plants in my aquariums. Now, no matter the plant, no melt and new growth.
The only recommendation would be, don’t use mineral oil until you get the hang of the adjustments. I bubbled the oil into the diffuser, now I have to try and clean it.