Description
GLA PRO-CO2 Reactor 5L – Maximum CO2 Saturation for Nature Aquariums / Planted Tanks
Our GLA PRO-CO2 Reactor is engineered for unmatched CO2 dissolution, delivering maximum efficiency with zero waste. Designed for serious aquascapers, this reactor ensures stable, high-level CO2 saturation, optimizing plant health and growth in high-tech nature aquariums.
- 5L High-Capacity Chamber – Handles high-flow filtration while maintaining consistent CO2 saturation.
- Precision-Designed in the USA – Built from professional-grade acrylic (19" tall × 6" diameter) for durability and performance.
- Whirlpool Diffusion System – Creates a high-flow vortex, ensuring complete CO2 absorption before water returns to the aquarium.
- Universal Fit – Compatible with 12/16mm, 16/22mm, and 20/25mm tubing, seamlessly integrating with canister filters and external pumps.
Installation & Functionality
1️⃣ Connect inline with your canister filter’s output.
2️⃣ Attach CO2 tubing using the easy Speedfit connection—a secure, tool-free fitting with a built-in on/off valve for precise CO2 adjustment.
3️⃣ Let the vortex effect optimize CO2 dissolution, ensuring full saturation before water returns to the tank.
4️⃣ Fine-tune CO2 levels to meet the demands of your planted aquarium.
Built for aquascapers who demand professional-grade performance, the GLA CO2 Reactor delivers precise CO2 control, unmatched efficiency, and superior plant health.
Customer Reviews
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GLA PRO-CO2 Reactor 5L
GREAT QUALITY REACTOR,NO NOISE,NO LEAK,DISSOLVES 100% OF CO2,VERY HAPPY.
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Totally transformed my tank.
Not new to reactors but new to GLA’s co2 reactor. This is an absolute beast and does the job very well. I trim stem plants every few days now and have been replanting like crazy. Totally worth the investment.
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My first time with a co2 reactor and absolutely love ❤️ it!
I’ve only used co2 diffusers the last 2-3 years and while they’ve been great I never was a huge fan of all the billions of micro bubbles. I took the plunge this month on this reactor and it’s been just wonderful. My co2 levels are perfect and keeps my drop checker in the yellow zone lol, yeah I know but my fish don’t mind and my plants have never pearled as much as they do now. Great product and even better customer service, they are just so kind. :)
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This is the co2 reactor.
I’ve tried a few co2 reactors and this thing blows them away. It’s huge, let’s say that first. Second, zero co2 escapes this reactor so every bubble you inject gets saturated. If you’re new to using a co2 reactor know there’s a 2-4 day tune in time. It takes you a few days to get your co2 levels perfect. And when you do they are absolutely perfect. I built a raspberry pi pH controller to monitor my GLA CO2 System and my data log reports are rock steady for my co2. I love this thing it’s been an absolute dreamy unit.
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This co2 reactor is a game changer for my tank.
I wasn’t sure how this would turn out after using regular inline diffusers but man is this thing awesome. Water is crystal clear and at the end of the day the amount of pearling is crazy! Took me a few days of dialing in as I suspected and I definitely won’t be going back to traditional diffusers ever. Just bought a second one for my new scape underway. Thank you GLA customer service you guys are amazing!
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Best purchase for my 150g tank was a GLA ful co2 system and reactor.
Pumped on this co2 reactor. Saturates every bubble I inject and my co2 levels are rock steady. Took a few days for me to dial in but man it’s awesome. Plants pearl like crazy now. Looking forward to adding one to my 80g tank next week.
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I’ll never use any other method of diffusion.
Fantastic co2 reactor, if you want clear water without all the fizzy co2 loon this is it! I absolutely love it, but it doesn’t come with a check valve so make sure you get one. Other than that my 150g is loving this paired with an Aquelle filter.
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Best of the best!
I’ll be buying another one next week. Excellent quality and man this thing produces results. Intense pearling in my old tank like never before and definitely putting this in my office tank as well.
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Love it!
Very happy with this giant co2 reactor. Quality material and craftsmanship and it works just like it should. Tank is a 150g abd pearling nicely!
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This is much better than a diffuser.
I’ve been very pleased with this reactor. There is a lot to learn when using a reactor. Without the educational support of GLA I would not have known I was doing everything wrong, or mostly wrong. This has my co2 levels extremely stable now that I’m properly set up. My plants now pearl like crazy and trimming is now the focus of attention on my aquascapes. I came today to buy another one for another aquascape using a regular diffuser. The folks at GLA are extremely nice and helpful beyond measure. They treat you like a family member which is rare this day and age. Shout out to Brian for all the help you offered me along my journey.
