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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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.
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Big boy co2 reactor!
Even though I measured I was impressed when it arrived. The volume is nice and big. It has no issue handling my 160g tank with high levels of co2. Took me approximately 3 days to dial in with a ph controller and is now fully automated. Apex controller shows co2 levels are super stable 24/7. Worth every penny and really good quality craftsmanship.
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This is an absolute unit!
Much bigger than anticipated. Hooked up to a Fluval FX using tubing adapters on the inside of the fluval tubing and hose clamps. Works fantastic! Took me two days to get my drop checker into the yellow with about a 1.5 drop in ph. Super pumped on this reactor, especially the lack of visible co2 bubbles.
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Co2 reactor
This was the very best CO2 management tool ever created for the planted tank hobby. It dissolves the CO2 with such precision and purity that it would be hard to imagine there being anything else out there that can beat it. I’ve never minded diffusers or the bubbles but the CO2 fluctuated. This unit even after the CO2 regulator shuts down is still holding and dissolving CO2 through the night. Just gradually keeping the aquarium stable. Whom ever designed it “ Nailed it “!!!!!!!
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This co2 reactor works!
Have had this hooked up to my Fluval FX for about a week. It took my a few days to get my co2 levels dialed because I was moving slow, but man does this work extremely well. Plants are super pearly by mid day. Zero complaints!
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GLA products
There many companies out there to chose from but not like GLA. I purchased everything for my planted tank from them and the quality is spot on. The support team is super cool and stay with you till they know your set. Thanks GLA.
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They should call this the co2 blaster 1000
This thing works! It’s a true beast of a co2 reactor and works flawlessly. Pro tip: This isn’t a diffuser and works on different principals so if you’ve never used one have GLA free tech support help you adjust your system. GLA was absolutely stellar with customer support. They helped me tune my aquascape gas exchange and now my plants are growing before my eyes, literally! The pearling I get now is just unreal and a sight to see. This co2 reactor is worth every penny.
