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 found the solution to my co2 levels in this co2 reactor.
Almost gave up on my 120g scape due to so many issues keeping my co2 levels stable. I will say GLA helped a ton with my tank. I was doing so many things wrong I had no idea. By implementing this reactor and GLA’s guidance my plants are busting with oxygen before lights out. Amazing product and customer support you’d expect to pay for, I certainly should have paid them for all the help. Thank you GLA.
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Where has this been all my life!
My plants are pearling like crazy since I started using this reactor. Needless to say this bad boy works!
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This is one heck of a co2 reactor.
I saw the dimensions in the listing, but it doesn’t do it justice. The bad boy is nice and big. I have this on a 160g tank and it’s working superbly. It did take me a couple days to adjust things, to be expected. Super happy, very well made reactor from GLA.
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Works like a charm and total clarity.
Works flawlessly. My tank is finally crystal clear and no issue with fizzy looking water. However I will say be sure ot use a check valve on your co2 tubing as this does not come with one. Also, cool side effect happens is your plants will start to produce millions of oxygen bubbles. My old diffuser was able to do this at a fraction of the level. Now the amount of oxygen production is super intense and quite beautiful. My fish eat the pure oxygen bubbles for dinner lol. Anyways, great products from GLA Im super happy.
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They should call this the SUPER co2 reactor.
The pictures do not do justice, this thing is a big and burly. I can not stress enough how intense my plants produce oxygen by the end of the day, its super intense and no diffuser ever did that for me. Super impressed with this, and thank you David for helping tune my co2 levels!
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Huge thanks to GLA and team!
Highly recommend GLA products. Got a whole co2 system and this reactor and could not be happier. Everything was high quality and packaged well. Service was top notch!
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This bad boy is the jam!
This is THE co2 reactor. 3 weeks solid so far and haven’t touched a dang thing. My apex controller says my co2 has never been more stable. Love this thing!
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Brilliant co2 reactor and great customer support!
Wonderful experience was had working with GLA and my first co2 reactor. I come from years of old diffusers and inline diffusers but grew tired of the frothy bubbles all over. It wasn’t bad but once you see a clear tank enriched with co2 it’s hard to pass up the concept. My local fish shop has GLA products and they had one of these hooked up on a big display tank. I ordered one with a new co2 system and in 5 days it arrived and was set up. I did have GLA assist me with tuning the co2 bubble rate and in 48hrs my drop checker was a lime yellowish green and was advised to lower my bubble rate. Day 3 it was perfect. Everything has been sparkling clear and my plants are loving it! A million thanks David at GLA for all your help!
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GLA has the best co2 equipment no exception here.
I have the first gen version of this reactor in steel and very pleased with it. I waited a while for my second tank to get all the bits in line and this was the final piece. After two days of dialing in my co2 this thing is incredible. My water is crystal clear and plants are pearling like mad. I get more pearling plants with this reactor than I did with my inline diffuser. Solid build quality typical of GLA.
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Loving this reactor so far.
Ditched my inline diffuser for this and the results are incredible. My atomizer never made my plants pearl nearly as much. Didn’t take long to get dialed in thanks to the support from GLA. Their tech support is amazing and very helpful. If you buy this and never used a co2 reactor before, reach out to these guys and save yourself the time of knowing how to properly use a reactor. You won’t regret it.
