Description
GLA GRO Paintball Planted Aquarium CO2 Regulator
Precise CO2 control for compact paintball-style cylinders.
The GLA GRO Paintball Aquarium CO2 Regulator combines piston-type pressure regulation, precise CO2 adjustment, and automatic operation in a compact design. Engineered for compatible paintball-style CO2 cylinders, it provides dependable CO2 control without requiring a full-size cylinder installation.
Ideal for planted aquariums where installation space is limited, GRO Paintball features an integrated solenoid, working-pressure gauge, and precision needle valve for convenient daily operation.
Each GLA GRO regulator is individually inspected, pressure tested, and leak checked in the USA before shipment.
At a Glance
- Pressure Regulation: Precision piston-type mechanism
- Cylinder Connection: Compatible paintball-style CO2 cylinders
- CO2 Adjustment: Precision needle valve
- Automation: Integrated electric solenoid
- Monitoring: Working-pressure gauge and bubble counter
- Expansion: Optional GRO CO2 splitter for multiple aquariums
- CGA-320 Conversion: Adapter included for standard USA refillable CO2 cylinders
Best For
- Planted aquariums using compatible paintball-style CO2 cylinders
- Compact installations where a full-size cylinder is impractical
- Desktop aquariums and smaller aquarium cabinets
- Aquarists seeking precise CO2 adjustment and automatic timer control
- Installations where a smaller refillable CO2 source is preferred
- Multiple aquariums with optional GRO splitter expansion
Cylinder Capacity: The GRO Paintball regulator is not limited to a particular aquarium size. However, paintball-style cylinders generally hold less CO2 than larger refillable cylinders, so refill frequency will depend on your aquarium's CO2 consumption.
Why Choose the GLA GRO Paintball?
GRO Paintball combines the convenient size of a paintball-cylinder connection with the precision adjustment, automatic control, and integrated monitoring of the GRO regulator platform.
- Compact Paintball Configuration: Connects to compatible paintball-style CO2 cylinders, allowing a smaller installation footprint.
- Piston-Type Pressure Regulation: Reduces cylinder pressure to a stable, adjustable working pressure for consistent CO2 delivery.
- Precise CO2 Adjustment: The needle valve provides fine control of CO2 flow and can be rotated 360° for convenient positioning.
- Automatic CO2 Control: The integrated solenoid allows CO2 injection to turn on and off automatically using a timer or compatible controller.
- Easy Monitoring: The working-pressure gauge displays regulator output pressure, while the bubble counter provides a visual reference for adjusting CO2 flow.
- Integrated Protection: A pressure relief valve provides additional protection, while the bubble counter check valve helps prevent aquarium water backflow. Micron filtration helps protect internal regulator components.
- Durable Construction: An aluminum regulator body, precision metal-on-metal valve seat, and quality pneumatic components are designed for long-term use.
- USA Inspection & Testing: Every GRO regulator is individually inspected, pressure tested, and leak checked in the USA before shipment.
Compact Paintball Cylinder Configuration
Paintball-style CO2 cylinders provide a space-saving alternative to larger refillable cylinders. They're particularly convenient for desktop aquariums, smaller equipment cabinets, and installations where a conventional CO2 cylinder would be difficult to accommodate.
GRO Paintball provides the same adjustable pressure-regulation capability as the standard GRO platform. The primary differences are the cylinder connection and the amount of CO2 available from the selected cylinder.
A smaller cylinder may require more frequent refilling, especially in heavily planted aquariums with higher CO2 consumption.
What's Included
- GLA GRO Paintball CO2 Regulator
- Integrated electric solenoid
- Integrated working-pressure gauge
- Precision adjustable needle valve
- Integrated bubble counter with check valve
- Interchangeable paintball pin-style and CGA-320 cylinder adapters
What You'll Need Separately: A compatible paintball-style CO2 cylinder, CO2-resistant tubing, and a diffuser, inline atomizer, or reactor are required to complete your CO2 installation. These items are sold separately.
A CGA-320 adapter is also included for customers who wish to use the GRO Paintball regulator with a compatible standard USA refillable CO2 cylinder.
Optional CGA-320 Cylinder Conversion
Want to switch to a larger CO2 cylinder in the future? The GRO Paintball regulator can be converted for use with standard USA CGA-320 refillable CO2 cylinders using the included GLA CGA-320 Adapter.
This allows you to increase available CO2 capacity without necessarily replacing your GRO regulator.
Important: Both the paintball pin-style and CGA-320 adapters are included but are not preinstalled on the regulator. Select the appropriate adapter for your cylinder and securely install it onto the regulator using the supplied CO2 wrench before connecting to the cylinder.
View the GLA GRO CGA-320 Adapter
Optional Multi-Aquarium Expansion
The optional GLA GRO CO2 Splitter allows one GRO Paintball regulator and CO2 cylinder to supply multiple planted aquariums.
Each splitter outlet has its own precision needle valve, allowing independent CO2 flow adjustment for each aquarium.
Keep in mind that operating multiple aquariums increases total CO2 consumption. A larger cylinder may be more practical depending on your installation.
Technical Specifications
- Model: GLA GRO Paintball Aquarium CO2 Regulator
- Pressure Regulation: Piston-type mechanism
- Cylinder Connection: Compatible paintball-style CO2 cylinders
- Adjustable Working Pressure: 0–70 PSI
- Pressure Monitoring: Integrated working-pressure gauge
- Needle Valve: Precision, 360° adjustable
- Automation: Integrated electric solenoid
- Bubble Counter: Integrated, with check valve
- Pressure Relief: Integrated pressure relief valve
- Regulator Body: Aluminum construction
- Valve Seat: Laser-precision metal-on-metal
- Filtration: Multi-stage micron filtration at inlet and outlet
- Multi-Aquarium Expansion: Optional GLA GRO CO2 Splitter
- CGA-320 Conversion: Compatible CGA-320 adapter included
- Quality Control: Individually inspected, pressure tested, and leak checked in the USA
The GLA Difference
20 Years of CO2 Expertise. A Commitment That Goes Beyond the Equipment.
For 20 years, Green Leaf Aquariums has specialized in CO2 equipment for planted aquariums. Throughout that time, we've remained committed to advancing the quality, precision, and reliability of aquarium CO2 regulation. Our experience, long-standing manufacturing partnerships, and close relationships with our customers have helped shape the equipment we offer today.
We don't believe in standing still. We work closely with our manufacturing partners to continually refine our products, incorporate real-world customer feedback, and introduce meaningful improvements. From precise piston-type regulation to advanced dual-stage designs and modular expansion, GLA has consistently worked to raise the standard for aquarium CO2 equipment through thoughtful engineering and innovation.
Every GLA CO2 regulator is individually inspected, pressure tested, and leak checked in the USA before shipment. We take quality control seriously because we understand the importance of dependable CO2 delivery and the trust our customers place in our equipment.
But what truly sets GLA apart is the company behind the products. We're a small business with a personal commitment to the people we serve. We take pride in helping customers select the right equipment, answering technical questions, providing installation assistance, and offering knowledgeable support long after the purchase. We're invested in our customers' success, and we genuinely care about their experience.
That commitment is backed by our Limited Lifetime Warranty on GLA CO2 regulators and systems for the original purchaser, covering qualifying defects under our warranty terms.
When you choose GLA, you're investing in more than precision-engineered CO2 equipment. You're choosing two decades of specialized experience, continuous product development, careful quality control, and a business that stands behind what it sells.
Twenty years of experience. A continuing commitment to innovation. A company that stands behind you.
Frequently Asked Questions
What type of CO2 cylinder does GRO Paintball use?
This regulator is designed for compatible paintball-style CO2 cylinders. Please confirm your cylinder's connection type before ordering.
Is GRO Paintball only for small aquariums?
No. The regulator itself is not limited to a specific aquarium size. Smaller paintball cylinders simply hold less CO2 and may require more frequent refilling as aquarium CO2 demand increases.
Can I use a standard refillable CO2 cylinder later?
Yes. The included CGA-320 adapter allows the GRO Paintball regulator to connect to compatible standard USA refillable CO2 cylinders. Select and install the appropriate adapter for your cylinder before installation.
Can GRO Paintball supply multiple aquariums?
Yes. The optional GRO CO2 Splitter allows one regulator to supply multiple aquariums, with independent CO2 flow adjustment for each outlet.
Can I use GRO Paintball with an inline atomizer or CO2 reactor?
Yes. GRO Paintball supports common planted aquarium CO2 diffusion methods, including ceramic diffusers, external inline atomizers, and compatible reactor systems.
Does this regulator include a paintball CO2 cylinder?
No. This listing includes the GRO Paintball regulator and its integrated components. A compatible paintball cylinder, CO2-resistant tubing, and diffusion equipment are sold separately.
Pre-Sales & Installation Support
GLA provides expert pre-sales assistance, equipment compatibility guidance, and installation support by email and text. Whether you're selecting accessories or setting up your CO2 regulator, we're here to help.
Support & Warranty
GLA Warranty: GLA CO2 regulators include a Limited Lifetime Warranty on qualifying mechanical manufacturing defects and a 2-Year Limited Warranty on qualifying electrical manufacturing defects. Coverage applies to the original purchaser and is non-transferable. For complete systems, regulator warranty coverage does not automatically extend to cylinders, tubing, or other accessories.
Service & Returns: GLA prioritizes repair whenever practical. CO2 regulators and systems are not eligible for voluntary returns. Warranty claims require GLA evaluation and authorization before equipment is returned for service.
For complete coverage, exclusions, service procedures, and domestic and international warranty terms, review our Shipping, Returns & Warranty Policy.
Customer Reviews
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Love this paintball regulator.
So neat and simple to use. It is a very sturdy feeling piece. Adjsuting the co2 into my Beta tank was much simpler than I thought. Very happy with everything I would certainly buy again. Except next time Im going with the 5Lb cylinder.
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Great build quality.
Great paintball regulator. I needed a compact regulator and this fit the bill. Needle valve is super precise and much easier to use. Even the art work on the packaging was cool lol :)
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Compact co2 regulator.
I like this regulator because it fits on my counter top. The main reason I went with this is because its compatible with all cylinder types. When Im ready for full size I just get the GLA adapter. GLA has been terrific.
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Love this paintball regulator.
I needed a compact regulator to fit my space. This fit the bill perfectly. Not only that I really liked the fact I can use this on any cylinder type available using GLA's adapter. The installation was only 2 minutes and dialing in the bubble rate was a breeze. Once I notice the gauge start to drop that tells me its time to change cylinders. Love it.
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Regulators and other items.
Top notch regular. If fact everything I have ever purchased from Green Leaf Aquariums has been of the highest quality you can expect. Have never been disappointed with anything I have purchase from them.
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Wonderful Regulator
I couldn't be happier with my GLA GRO Paintball Regulator. Its precise and consistent, maintaining the bubble count even after restarting each morning. Its small size makes it super convenient to hide, although I prefer to show mine off due to its high quality. I'll will certainly continue to use GLA regulators for my future tanks.
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Worth every penny! When you read the instructions lol
Thankfully I used the brain cells I have left and followed GLA's basic instructions on how to use the diffusers. Works amazingly well when you actually follow instructions.
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Gro paintball aquarium co2 regulator
This is a must have, especially for those with a smaller tank with limited space. This regulator’s assembly is excellent, reliable and has a small profile which makes it easy to hide.
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You get what you pay for.
Really well made and worth every penny. Don’t cheap out on a regulator. It’s important and you won’t be made AT ALL with this one. Really fast shipping to. Like really fast!!!
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Easy to use, high quality
I'm very happy with this regulator. It sealed right onto the paintball canister, no leaks. Everything feels solid and well built. It's also very easy to adjust. Both the regulator and needle valve have plenty of degrees of rotation so I can dial in both pressure and bubble count. The solenoid only gets mildly warm; it's not even uncomfortable to touch. I would recommend this without hesitation for anyone looking for a compact CO2 system.
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Perfect Paintball regulator
I ordered 4 of these regulators, for 4 different aquariums. Since I had limited storage space the best solution for me was to use 24oz paintball cylinders and GLA GRO regulators. Everything fits perfectly! Any other kind of regulator would have been too tall. I've ordered many products from Green Leaf and they are all exceptional in quality, as is the communication and attention to detail!
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Reliable and Well - Built
I had been searching for the sweet spot in terms of CO2 injection in my tank. I have tried a cup diffuser, which proved to be problematic given the length of the tank with the lily outflow I was using. Also gave a shot to different regulators that just didn't cut it. Enter Orlando and team who kindly walked me through the many nuances of a regulator. I took the plunge, picked this bad boy up, and was pleasantly surprised with the result and stability. Regulators are a primary key in your CO2 injected system, and you might save a few bucks elsewhere, but you just can't go wrong with a quality build from GLA. Couple that with the excellent support and Warranty, and you have yourself a winner. Spend the extra $$ and get it right the first time. Save yourself the headache of searching for different things that "might work" and get something that will not only work well but last!
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A solid and reliable bit of hardware.
I have a 45-P aquarium that could benefit from injected CO2. After all the days of shopping and research I concluded that GLA had the most suited option for my planted setup in the form of the Gro Paintball Regulator. The unit came promptly in secure packaging and was very easy to put into use. Unlike standard tank regulators, the paintball regulator does not utilize the included nylon seal as the paintball tank already has a gasket. Very convenient. Speaking of convenience, the included bubble counter/check valve and the solenoid make this unit very convenient as a nearly all-in-one CO2 regulator kit. The only real “task” to get CO2 running in the tank is finding a local supplier. (Hint: buy your tanks from the local supplier for potential discounts on refills) Be sure to also get a CO2-purpose coil of tubing and either an in-tank or in-line diffuser. Oh, and their customer service is by far the best I have experienced in all my years of online purchases. Quick to reply and helpful always. Order with confidence.
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Thank you!
What a breath of fresh air this paintball regulator has been. After having so many issues with other brands this regulator has been a dream. The main selling point for me was the fact that this model can be used on every type of cylinder the market has to offer. It fits paintball,CGA-320 and disposable types. I think GLA should put that in the item description. Had I not contacted them I would have never known this. It arrived just in time for my christmas party woot! Thanks a million GLA.
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Worth more than 5 stars
Support team was absolutely brilliant. I emailed them because I was having difficulty with installation and to my surprise I got a reply within minutes. Because of my busy schedule, I sometimes emailed them at midnight. I was walked throughout patiently even replying to my email at 4 in the morning. After buying -and spending on different cheap products, I regret not discovering this sooner. It works way better than others.
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Takes some time and experience to tune it, but works like a clock now
I got this about 1 year ago just when they launched it. At first the pressure would swing like crazy. I didn't notice and just kept tuning it. After I lost all my fish (about 20 of them) I contacted them on messenger and their support was A M A Z I N G. They guided me through the process of disassembling the needle valve, checking it and assembling it again. Since then I've kept it at around 37-38 psi of working pressure with about 2 bubbles per second and my paintball tanks are lasting about 3 months. Plants a doing really well.
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The best!
I replaced this regulator out from a cheaper one I bought. My old regulator for the life of me would not stay in tune. This one has been a set it and forget it. I absolutely love this regulator. It’s the best hands down!! Thanks GLA
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GLA GRO PAINTBALL REGULATOR
I've had it for a week now, and I've got to say I'm really happy with my choice. I was going to go with something much cheaper, convert a disposable setup into paintball tank usage... But after reading so many reviews, so many problems with all the cheaper i decided to just get one nice system that would be well built and work forever. I'm really glad i did. The needle valve makes precise changes to bubble rate. (I set my working pressure below what was recommended to exert finer control.). I'm really happy. My planted tank immediately took off, algae slowed down.
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GLA Pro Paintball Regulator
GLA regulators have been my go to since I began the hobby many years ago. I have never once had a problem with any of my equipment and the customer support from Orlando goes above and beyond what you could expect shopping anywhere else.
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GLA GRO Paintball Regulator
This is without a doubt one of the best aquarium purchases I've ever made. The build quality is incomparable. Although shipping was slow (free shipping though) it was packaged in a way that it would be impossible to take damage during shipping. The needle valve is very smooth and easy to dial in to your exact need. No guess work or inconsistencies in bubble count. As soon as my timer goes on it is operating at the bps I set it to. This is not a product where shortcuts were taken. Again, this is an incredibly well built product with the consistency to match. Worth every penny
