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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Holy cow!
What a beast of a reactor. This thing came with all the various hose barb connections to hook up to a closed loop I made specificity for this reactor. Using a marine DC pump with controller allowed me to fine tune the flow rate going into the reactor. I’ve got a tremendous amount of pearling in my tank by 1:30/2pm . I never had that with my standard diffuser, to me that’s a game changer. I’m curious to see what adding a ph controller would do, I’ll leave that for another day though. This thing is awesome!
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GLA always has the best co2 equipment.
For decades I’ve always come to GLA for my co2 gear and essentials. After being out of the joint the last year I started back up this fall piecing my system together. I received my reactor yesterday and it’s been going now for 2 days and it’s been a treat to see my plants pearl like crazy. I never liked the 7-Up look from normal co2 diffusers, but I didn’t expect my plants to pearl so much my tank looks like 7-Up again lol. O my this time its oxygen. My Fluval FX powers the reactor and it’s absolutely beautiful. I’m looking forward to GLA figuring out a method to inject fertilizer into the reactor from my autodoser. After conversing with David at GLA he says it’s already in the works and should be ready any day. Supposed to be plug n play with the reactor so I’m really looking forward to that.
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One heck of a co2 reactor.
This is my first true co2 reactor as I come from the old Rex Grig era of pvc reactors. Using an Oase canister filter seems to work like a champ. I will say my pvc reactor was working ok but made loads of noise and started leaking which isn’t my favorite. I wanted something quieter and came to GLA to order there apparently older style acrylic reactor. Turns out it was made of plastic vs acrylic and smaller in size. I ordered this new one and installed it and so far it’s dead silent. I use an Oase skimmer on my tank to keep the surface clean and was told this will offset some of the co2 I’m injecting. Drop checker is a decent green as of 6pm today. I suspect I’ll be making adjustments as I go along. So far the quality of the build is top notch. Exactly what I see with my more expensive reef tank calcium reactor. Similar concept here all around. Really liking this unit and looking forward to see how it ages. I’d definitely recommend this reactor to anybody.
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Superb design co2 reactor.
High quality reactor, BIG:). Very good performance and minimal loss of flow from my pressure pump on ADA Superjet filter. GLA quality is present in this reactor and much improved from the previous acrylic design. Which, in fairness was a good design but was smaller and diminished flow and pressure. From a technical standpoint these two points are critical for a good working reactor. Very pleased thus far and only been in service for one day, but I see it’s working quite well. Impressive reactor by GLA.
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Huge improvement with the new reactor.
Hooked it up this morning after removing my older GLA acrylic reactor and what an upgrade! First, the .45* elbow is a game changer compared to the old 90* elbow. My flow going into the reactor is stronger and I have more pressure building up within the reactor. It’s been about 6hrs now and it’s been awesome. With the old acrylic reactor by now I’d have a gigantic gas pocket. Right now I have a negligible gas pocket which I totally expect. But I’m guessing the larger volume and increased flow and pressure are helping a ton here. We will see how the next few days fair, but for now it’s absolutely awesome.
