Description
GLA PRO-CO2 Reactor 5L – Maximum CO2 Saturation for Nature Aquariums
The GLA PRO-CO2 Reactor 5L is engineered for unmatched CO2 dissolution, delivering maximum efficiency with virtually zero waste. Built for serious aquascapers and high-tech planted aquariums, this reactor ensures stable, high-level CO2 saturation to support vibrant, healthy, and fast-growing aquatic plants.
Key Features:
- 5L High-Capacity Reactor Chamber: Designed to handle high-flow filtration systems while maintaining consistent CO2 saturation throughout the water column.
- Precision-Designed in the USA: Constructed from professional-grade, crystal-clear acrylic for durability and long-term performance (19" tall × 6" diameter).
- Whirlpool Diffusion System: The internal vortex chamber creates a high-flow whirlpool effect, ensuring complete CO2 absorption before water returns to your aquarium.
- Universal Tubing Compatibility: Supports 12/16mm, 16/22mm, and 20/25mm tubing for seamless integration with most canister filters and external pumps.
- Quiet, Bubble-Free Operation: Eliminates microbubbles and CO2 noise common with diffusers—ideal for display tanks and living spaces.
- Maximum CO2 Efficiency: Reduces CO2 loss and ensures every bubble is fully dissolved, saving gas and improving stability.
- Maintenance-Friendly Design: Wide body and removable top allow for quick cleaning and access to internal components.
Installation & Functionality:
- Connect the reactor inline with your canister filter’s return/output line.
- Attach CO2 tubing using the built-in Speedfit connection—a secure, tool-free fitting with an integrated on/off valve for precise CO2 control.
- Allow the vortex system to create a high-energy mixing environment that fully dissolves CO2 before water re-enters the tank.
- Adjust your CO2 rate to match the demands of your planted aquarium for optimal growth and stability.
Why Choose a GLA CO2 Reactor?
- Professional-Grade Performance: Built for high-demand aquascapes requiring stable and high CO2 levels.
- Enhanced Plant Growth: Provides consistent, fully saturated CO2 delivery that drives lush growth and stronger coloration.
- Ideal for Larger Tanks: Perfect for medium to large nature aquariums where diffusers cannot keep up with CO2 demand.
- Energy Efficient: Works flawlessly with existing filtration—no additional power required.
Built for aquascapers who demand uncompromising performance, the GLA PRO-CO2 Reactor delivers precise CO2 control, maximum dissolution efficiency, and superior plant health for the most demanding planted tanks.
Customer Reviews
-
GLA is the best in aquascaping gear.
Been a customer with GLA since 2008. Still using my old co2 kit from then and now upgraded to this co2 reactor. It’s been an amazing unit and works really well on my 120g tank. It’s a huge reactor so it’s been able to handle the high flow from my pump and large amount of co2. Thanks GLA for continuing to put out great products.
-
Very pleased with this co2 reactor.
Super efficient and high quality reactor. Using this on my 90g has been an absolute success. Plants are happy and my drop checker is a perfect shade of green/yellow. Yes I keep my co2 on the high side but my tank is happy!
-
Beast mode has been activated!
The photo does no justice with this reactor. It’s massive and works perfectly! Co2 levels are stable and stay steady everyday. I have my co2 on a ph controller so my levels are dialed into perfection. High quality unit that freaking works! A++
-
This thing rocks!
This is what I’ve wanted since ditching my Cerges reactor. That thing was a nightmare and an absolute abortion of a design. With this it’s just super easy to use and I don’t ever mess with it. My co2 is stable and always puts my drop checker near the yellow zone in short time.
-
GLA the best in co2 equipment.
I use GLA equipment for years and never a problem. GLA customer support always very kind and supportive anytime I have a question on anything. Really love their text-message support system which was just incredible at my success with my aquascape. This will be my 2nd time entering IAPLC contest and already feeling positive. Love this reactor.
-
Absolutely love it ?!
Best co2 reactor for planted tanks. Many trials and errors for me and co2 reactors until now. I have 3 reactors now in a junk pile after constant adjusting I just could not manage. This reactor took me 2.5 days to get dialed in, and it’s perfect now. This reactor is big time volume which I really like and it’s likely the culprit of the success with its huge volume, but I don’t know. It’s built extremely well of high quality material and I have no doubt this will be my favorite method of diffusion.
-
❤️Absolutely love this co2 reactor.
Coming from a smaller competing brand this thing blows every other reactor away in construction and overall performance. Zero co2 escapes this thing unlike the other brand I invested in. Whats even better is its quality, it’s built better from top to bottom and much larger in volume, in fact it’s huge and bigger than my co2 system. Tank drops a full 1.5ph in short time and pearls like crazy before my lights are out. GLA always brings top quality planted aquarium products.
-
Beast of a co2 reactor, I mean it’s huge.
I come from a long history of using co2 reactors. My first one was from GLA about 16 years ago when they made large PVC reactors. I actually still have it in service today. Years later I adopted an Aquariumplants.com reactor which is basically a Cerges reactor. That was close to a nightmare to get dialed in and hated that stupid internal pump they implemented. I then purchased the plastic reactor GLA use to have listed on their site but appears to be no longer available. I actually like that one a lot except it’s to small in volume. Fast forward to now I have this giant reactor. It’s absolutely perfect. It’s build extremely well and the volume it has is exactly what I prefer. It handles a big co2 flow rate and no co2 is able to escape. It’s bigger than my actual co2 system, it’s that big. Always loved GLA products because they bring quality stuff that delivers. Customer service is second to none.
-
Changed my Dutch scape into an absolute garden.
This co2 reactor completely changed my plant beds. I’ve struggled for months trying to get stable co2 in this tank. It’s a 75g with a 30g sump so I was always making adjustments and almost gave up. I’ve had this installed now for 3 weeks and it’s been such a blessing. I'm more hands off now and spend more time now figuring out my fert dosage. Trimming,dosing and maintenance are all I do, I no longer mess with my co2 system. Plants look fantastic and I’m now making a little money back selling my plant clippings on Facebook and forum pages.
-
This is a quality built co2 reactor I’ve been looking for.
I bought two of these for my two aquascapes. One uses an Eheim 2262 and the other uses an Eheim Pro. I like that this reactor comes with several sets of hose connectors. I didn’t have to glue any adapters or make any modifications. Everything came ready out of the box including a whole roll of Teflon tape. The volume of this reactor is massive, much larger than competing brands so it’s able to hold up well for my 220g tank using the big Eheim 2262. After about 3 days of adjusting my co2 bubble rate I have a nice 1.3 ph drop in short time. Nice and gradual and not stupid fast where it can stress my fish. On my 120g tank with the Eheim Pro I get the same exact outcome. Except this tank is half the volume so I use much less co2. I’ve used a competing brand of GLA’s reactor that was smaller and wasted co2, co2 was actually escaping the reactor. To me that’s a failed design. No co2 should ever escape a co2 reactor. If it does , you clearly have a failed design. With this large format reactor from GLA NOT A SINGLE BUBBLE ESCAPES. Because of this I rated it 5 stars ⭐️ because it’s a quality built unit and does what it’s supposed to do without wasting a single bubble of co2. Thank you GLA staff for helping me and bringing us a great product.
