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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Great choice!
Recently received the GLA GRO Paintball Regulator. This option is the perfect choice to provide flexibility. It comes with everything needed to connect to the large disposable cartridges, paintball tanks, and large full size tanks. The regulator feels so well made and is working perfectly. Appreciated all the help from GLA to understand the options and help me make the right choice for me.
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Beautiful Co2 regulator, and then some.
To my surprise this regulator comes out of the box with all necessary adapters to fit every co2 cylinder. I purchased a few disposable cylinders for emergencies just in case. Amazing quality and the finish is well done. I ohm tested the surface just to check and it’s on par with our aircraft parts here at my job. This is good quality equipment at a very affordable price.
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Stellar paintball regulator
Very well made co2 regulator that delivers precision co2 and stability through the life of the cylinder gas contents. Couldn't be more pleased.
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GLA all the way baby!
I have other GLA regulaotrs but this is my first paintball. Its GLA quality all the way and what you would expect. GLA is the best in co2 no doubt about it. Built in solenoid, and comes with all the adapters for ll the various cylinder types.
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The Gro co2 regulator is the most versatile regulator I’ve ever owned.
Last week I bought the HLA paintball adapter for my Gro regulator I used for disposable cartridges. I must say, this is one terrific co2 regulator. The solenoid is built in with the needle valve on the adjacent side. The needle valves precision is extremely accurate and makes adjusting super easy. I like that I can either go back to a cartridge cylinder or even a full sized cylinder using their OEM adapters. It’s always steady in my settings and I’ve never had a compliant. Good products backed by even better people at GLA.
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Great build quality compared to Fzone
This is much higher end than the Fzone and other generic brands. Super precise in its bubble flow rate adjustments, much easier and stays rock solid everyday. One thing I noticed in the box is they give you the CGA-320 adapter as well with this regulator. Therefore out of the box this thing is adorable to every cylinder type, even their disposable cylinders. Can’t beat this.
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I love this regulator.
Extremely pleased with GLA and this regulator. Very fast dispatch service and quality product. My aquarium is happy and already on my second refill after 4 months. Installation was very easy and getting co2 up to snuff was very smooth. I’d buy another one if I needed.
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Great quality
Using this on a 5lb. tank in it is working perfect. I am getting a consistent bubble rate and pressure is holding right at 35psi. Turning on and off with no issues. Extremely happy with my purchase and the rock solid quality and very competitive price.
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Quality and support
I went with the lower priced regulators from Amazon thinking they were good enough. They don’t have psi adjustment so I thought I had a defective unit. David from GLA got me up to speed. Bubble count is solid, unlike the cheaper units. I’ll be replacing my other regulators with GLA!
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A Superior Product - The Best Paintball CO2 Regulator
This is quite simply the highest quality paintball regulator on the market. I had recently returned an FZONE brand regulator, which was both extremely low quality in many areas and impossible to get an air-tight seal. Immediately I saw how much better GLA's product was in all areas. The installation directions were easy to read and better than anything else I've seen in the hobby.
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Very nice paintball regulator.
I love this paintball regulator and more-so the needle valve, super sweet guys. I only wish GLA gave free tubing with the regulator vs having to buy it separate. The regulator is 5 stars all day, but I just feel it should have come with tubing. With that said Im here today to buy another one Hahaha!
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Best paintball co2 regulator Ive ever used.
My fish room is in a basement thats difficult to climatize so this space gets some temp fluctuations. This regulator so far has out performed my other regulators. GLA has some magical flow characteristic that makes adjusting the flow so easy and physically easy to see. With my other regulators Im always messing with the needle valve adjuster. I hate always messing with it so I decided to give GLA a try and boy what an improvement. Even my back feels better due to the fact I dont go checking the co2 anymore. I was so happy I came back to GLA today to buy one of the big full sized regulators with GLA's modular valve system. Great products from GLA.
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Bad ass!
GLA makes a bad ass regulator and I love it!
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Excellent Regulator!
I was using a UNS paintball regulator kit, which was absolute garbage and stopped working after only one week (not to mention the eye-watering price). I decided to return it to the store and buy this one instead. Just upon opening the package I could tell it is a superior quality than my previous one. It's been a week now running and couldn't love it more! Would order again!
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GLA is the go to for co2!
Been a long time customer of GLA for 15 years now. GLA really knows how to execute an aquarium co2 system properly. All my systems are still running flawlessly after years of abuse.
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Finally trouble free co2 for my aquarium.
This being my now 3rd regulator my wife was none to pleased. I tried for two years using a UNS and another Amazon version on my paintball cylinders and none would hold a seal for more than 45-60 days. I think it’s because those UNS versions seem real dinky, and not to sturdy. When I took this GLA paintball co2 regulator out it felt twice as heavy, more substantial. Not only that but I now get 4 months on a paintball cylinder, nearly twice as long. The needle valve on this is also very easy to tune. I’m living GLA co2 regulators.
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Highly recommend this paintball regulator.
Now my 3rd paintball regulator. I tried 2 UNS paintball regulators and both failed doing the same thing. They warrantied my first one, second one arrived and instantly was not able to set a normal bubble rate. I dont have a huge tank so this should have been easy. Thankfully I went to GLA and received this. My god, so easy. My bubble rate was rock steady day one and every day. Ok, I can live with this!
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Beautiful workhorse.
Very good price and super good quality. Today I come to buy another one for my fish room. Very neat packaging by thew way. I like the artwork lol Installation with this is super easy and I like most that if I want to upgrade one day to full size cylinder I can no problem with the same regulator. Bonus!
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Good quality and solid build
I bought this regulator after comparing it to other great options out there (UNS Mini, Co2 Art, etc) and found out that the price and the features were very attractive. Even though this is a single stage vs the other options, the GRO's natural decay and rise effect is extremely minimal which alleviates my concern regarding "end of tank dump". Extremely happy with my purchase.
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Best paintball regulator I’ve used.
I can only use paintball where I live and this is one exceptional paintball co2 regulator. It’s built well and very heavy duty. My co2 is super stable and and no longer mess with my needle valve. Love this regulator I’d give it 10 stars ⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️
