Description
GLA PRO-DS Dual Stage CO2 System (Modular)
The GLA PRO-DS Dual Stage CO2 System combines our full-size dual-stage regulator platform, modular CO2 distribution, a refillable aluminum CO2 cylinder, and CO2-resistant tubing in one configurable planted aquarium CO2 package.
Designed for aquarists seeking premium pressure regulation, expanded working-pressure capability, dual-gauge monitoring, and long-term system flexibility, the PRO-DS can be configured with one to six independently controlled CO2 outputs. Select the manifold configuration and cylinder package that best fits your current aquarium system while retaining the flexibility to expand later.
Each PRO-DS regulator is individually inspected, pressure tested, and leak checked in the USA prior to shipment.
At a Glance
- Pressure Regulation: Dual-stage
- Cylinder Connection: CGA-320 standard USA CO2 cylinders
- Included Cylinder: 5 lb aluminum CO2 cylinder; one- or two-cylinder package selectable at purchase
- Pressure Monitoring: Dual gauges for cylinder pressure and working pressure
- Output Pressure Range: 0–140 PSI
- CO2 Distribution: Selectable 1–6 aquarium modular configuration
- Independent Control: Precision needle valve and bubble counter for each manifold output
- Automation: Integrated electric solenoid
- Tubing: 10 feet of CO2-resistant aquarium tubing
- Warranty: GLA Limited Lifetime Warranty on the regulator
Best For
- Aquarists seeking GLA’s full-size dual-stage CO2 platform
- Single planted aquariums with future expansion in mind
- Multi-aquarium CO2 installations
- High-tech planted aquarium systems
- Applications requiring expanded working-pressure capability
- Hobbyists who want separate cylinder-pressure and working-pressure gauges
- Beginner and experienced aquarists seeking a scalable long-term CO2 system
The PRO-DS is not limited to a particular aquarium size or experience level. Appropriate CO2 delivery depends on plant demand, lighting, circulation, diffusion method, surface agitation, and overall system configuration.
Why Choose the GLA PRO-DS CO2 System?
The PRO-DS CO2 System combines GLA’s flagship dual-stage regulator architecture with modular CO2 distribution and the core components needed to establish a refillable pressurized CO2 installation.
- Full-Size Dual-Stage Architecture: Designed for refined working-pressure control and long-term stability
- Configurable Modular Manifold: Select from one to six independently controlled aquarium outputs
- Expanded Pressure Range: Adjustable output from 0–140 PSI provides additional flexibility for higher-pressure applications
- Dual-Gauge Monitoring: Separate gauges provide visual reference for cylinder pressure and regulator working pressure
- Precision CO2 Adjustment: Each manifold output includes its own precision needle valve
- Integrated Flow Monitoring: Each manifold output includes a bubble counter for convenient visual CO2 monitoring
- Automatic Operation: Integrated solenoid allows CO2 injection to be controlled using a timer or compatible controller
- System Protection: Integrated pressure relief valve provides an additional level of protection
- Refillable Cylinder: Includes one or two 5 lb aluminum CGA-320 CO2 cylinders depending on the selected package
Dual-Stage Pressure Regulation
Dual-stage regulators reduce cylinder pressure through two separate pressure-reduction stages. This architecture is designed to provide increased working-pressure stability as cylinder pressure changes over time and to reduce the likelihood of pressure increases as the CO2 cylinder approaches depletion.
The PRO-DS combines this dual-stage architecture with an expanded 0–140 PSI working-pressure range for aquarists who want maximum configuration flexibility from a single regulator platform.
- Two-stage pressure reduction
- Stable and controllable working pressure
- Reduced likelihood of end-of-tank pressure spikes
- Expanded 0–140 PSI output capability
Precision Control & Automation
Each PRO-DS manifold output includes an independently adjustable precision needle valve and integrated bubble counter, allowing CO2 flow to be tuned separately for each connected aquarium.
The integrated electric solenoid allows CO2 injection to be automatically coordinated with the aquarium photoperiod using a standard timer or compatible controller.
Dual gauges provide separate visual references for cylinder pressure and regulator working pressure. The working-pressure gauge is used when setting regulator output pressure, while the cylinder-pressure gauge provides information about pressure within the connected CO2 cylinder.
Bubble rate should be treated as an aquarium-specific reference rather than a universal measurement of dissolved CO2. Actual CO2 requirements vary with aquarium volume, plant mass, lighting, circulation, diffusion efficiency, and surface agitation.
Modular Manifold System
The PRO-DS CO2 System can be configured with one to six manifold blocks, allowing you to build the system around the number of aquariums you currently operate.
- PRO-DS-1: 1 independently controlled aquarium
- PRO-DS-2: 2 independently controlled aquariums
- PRO-DS-3: 3 independently controlled aquariums
- PRO-DS-4: 4 independently controlled aquariums
- PRO-DS-5: 5 independently controlled aquariums
- PRO-DS-6: 6 independently controlled aquariums
Each manifold block includes its own precision needle valve and integrated bubble counter, allowing every connected aquarium to be adjusted independently while sharing a single regulator and CO2 cylinder.
Compatible manifold blocks may also be added later until the six-output configuration is reached.
View GLA Modular Manifold Expansion Blocks
Refillable 5 lb Aluminum CO2 Cylinder
The PRO-DS CO2 System includes a refillable 5 lb aluminum CO2 cylinder with a standard CGA-320 connection. The cylinder ships empty and must be filled by a local CO2 or compressed-gas supplier before use.
One- and two-cylinder package options are available. Select the cylinder quantity that best fits your installation and CO2 supply needs when ordering.
Important: CO2 cylinders ship empty.
Engineering & Performance
- Dual-Stage Pressure Regulation: Two-stage architecture designed for increased working-pressure stability
- Laser-Precision Metal-on-Metal Valve Seat: Engineered for consistent regulation and long-term operation
- Multi-Stage Stainless Steel Micron Filtration: Helps protect internal pneumatic components from contamination
- Precision Needle Valves: Independent fine adjustment for each manifold output
- Integrated Bubble Counters: Visual CO2 flow monitoring for each connected aquarium
- Dual Pressure Gauges: Separate monitoring of cylinder pressure and regulator working pressure
- Integrated Pressure Relief Valve: Provides additional system protection
- Premium Pneumatic Components: Selected for precision, reliability, and long-term performance
- USA Inspection & Testing: Each regulator is pressure tested and leak checked prior to shipment
Specifications
- Installation: CGA-320 standard USA CO2 cylinders
- Pressure Reduction: Dual-stage
- Pressure Monitoring: Separate cylinder-pressure and working-pressure gauges
- Output Pressure Range: 0–140 PSI
- CO2 Distribution: Selectable 1–6 aquarium modular configuration
- Output Control: Independent precision needle valve for each manifold block
- Flow Monitoring: Integrated bubble counter for each manifold block
- Included Cylinder: 5 lb refillable aluminum CO2 cylinder
- Cylinder Quantity: One or two cylinders selectable at purchase
- Included Tubing: 10 feet of CO2-resistant aquarium tubing
What’s Included
- GLA PRO-DS Dual Stage CO2 Regulator
- Selected PRO-DS-1 through PRO-DS-6 modular manifold configuration
- Precision needle valve for each selected manifold output
- Integrated bubble counter for each selected manifold output
- Integrated electric solenoid
- Cylinder-pressure gauge
- Working-pressure gauge
- Selected quantity of 5 lb aluminum CO2 cylinders (ships empty)
- 10 feet of CO2-resistant aquarium tubing
- GLA OEM CO2 tank seal
Please Note: A compatible diffuser, inline atomizer, or CO2 reactor is required to deliver CO2 into the aquarium and is sold separately. The included CO2 cylinder ships empty and must be filled locally before use. For added protection against backflow, we recommend using a compatible inline check valve in your CO2 installation.
Frequently Asked Questions
Does the PRO-DS CO2 System include everything I need?
The system includes the PRO-DS regulator, selected modular manifold configuration, refillable CO2 cylinder, CO2-resistant tubing, and tank seal. You will also need a compatible diffuser, inline atomizer, or CO2 reactor to introduce CO2 into the aquarium. For added protection against backflow, we recommend using a compatible inline check valve in your CO2 installation.
Does the CO2 cylinder arrive filled?
No. CO2 cylinders ship empty and must be filled by a local CO2 or compressed-gas supplier before use.
Why are one- and two-cylinder options available?
The system can be ordered with either one or two 5 lb aluminum CO2 cylinders. Select the cylinder package that best fits your CO2 supply and installation needs.
What is the benefit of dual-stage regulation?
Dual-stage regulation reduces cylinder pressure through two pressure-reduction stages, providing additional working-pressure stability as cylinder pressure changes and reducing the likelihood of end-of-tank pressure increases.
How many aquariums can the PRO-DS System run?
The system can be configured with one to six manifold blocks. Each block provides one independently adjustable CO2 output with its own precision needle valve and bubble counter.
Can I expand the manifold later?
Yes. Compatible GLA modular manifold blocks can be added as your aquarium system grows, up to the six-output configuration. When expanding an existing regulator, select the manifold generation that matches your regulator because G2 and G3 manifold blocks are not cross-compatible.
Do all connected aquariums receive the same amount of CO2?
No. Each manifold block has its own precision needle valve, allowing CO2 flow to be adjusted independently for each aquarium. This is useful when connected aquariums have different volumes, plant mass, circulation patterns, or CO2 requirements.
Can different aquariums use different CO2 delivery methods?
Yes. Individual outputs may be connected to compatible diffusers, inline atomizers, or reactors provided the connected equipment is operated within its required pressure and flow range. Working pressure is shared by the regulator, while CO2 flow is adjusted independently at each needle valve.
What makes the PRO-DS different from the DS-Mini?
Both the PRO-DS and DS-Mini use dual-stage pressure regulation and modular manifold systems. The PRO-DS is GLA’s full-size dual-stage platform with a 0–140 PSI output range and separate gauges for cylinder pressure and working pressure. The DS-Mini provides dual-stage regulation in a smaller overall footprint with a 0–60 PSI output range and a single working-pressure gauge.
Why does the PRO-DS have a 0–140 PSI output range?
The expanded output-pressure range provides additional configuration flexibility for applications that require higher working pressure. Most aquarium installations will not require the maximum available pressure, and working pressure should always be adjusted to the requirements and operating limits of the connected CO2 equipment.
What do the two gauges monitor?
One gauge monitors CO2 cylinder pressure and the second monitors regulator working pressure. This allows both pressures to be viewed independently during setup and operation.
What size aquarium can I use the PRO-DS on?
The PRO-DS is not restricted to a specific aquarium volume. Appropriate CO2 delivery depends on plant demand, lighting, circulation, diffusion method, surface agitation, and overall system configuration. Its modular architecture also allows one regulator to support multiple aquariums when configured appropriately.
Is the PRO-DS suitable for beginners?
Yes. Dual-stage regulators are not inherently more difficult to operate during normal aquarium use. The PRO-DS is suitable for both beginner and experienced aquarists who want premium dual-stage pressure regulation, expanded working-pressure capability, dual-gauge monitoring, and long-term modular flexibility.
Choosing the Right GLA CO2 Platform
The GLA GRO is our streamlined single-stage platform for aquarists seeking compact, precise CO2 control. The DS-Mini combines dual-stage pressure regulation with a compact modular design, while the PRO-DS is our full-size dual-stage platform with expanded pressure range, dual-gauge instrumentation, and modular configuration options.
The PRO-DS CO2 System packages the PRO-DS regulator with a refillable aluminum CO2 cylinder and CO2-resistant tubing, providing a configurable foundation for single- or multi-aquarium planted CO2 installations.
Compare GLA CO2 Regulators & Systems
GLA CO2 Equipment
Green Leaf Aquariums specializes in planted aquarium CO2 equipment engineered around precision, reliability, and long-term performance. GLA regulator systems are built specifically for the demands of nature aquariums and high-tech planted aquarium environments.
Each GLA regulator is individually inspected and tested in the USA prior to shipment to help ensure dependable operation and consistent performance.
Support & Warranty
Return Policy: Due to the technical nature of pressurized aquarium CO2 equipment, this item is non-returnable and non-refundable. Qualifying defects remain covered under the GLA Limited Lifetime Warranty and are handled separately through warranty support. Please contact GLA prior to ordering if you need assistance with product selection, installation, or compatibility.
- Limited Lifetime Warranty: Regulator covered against qualifying defects in materials and workmanship
- Lifetime Support: Expert assistance available
- Installation Guidance: We’re here to help you get started
Limited Lifetime Warranty: GLA CO2 regulators are covered by a limited lifetime warranty against defects in materials and workmanship for the original purchaser. This warranty is non-transferable and applies only when the product is used in accordance with Green Leaf Aquariums, LLC (GLA) guidelines and standard operating practices.
Warranty coverage applies only to products purchased directly from greenleafaquariums.com or authorized sales channels. Proof of purchase is required for warranty claims.
This warranty does not guarantee product performance for the lifetime of the purchaser. Product lifespan may vary based on usage, installation, maintenance, and operating conditions.
- Coverage applies only to manufacturing defects under normal use
- GLA reserves the right to repair, replace, or issue store credit at its sole discretion
- If a product is discontinued, a comparable replacement or credit may be provided based on product condition and age
Warranty Exclusions:
- Improper installation, misuse, neglect, or accidental damage
- Use of improper tools, fittings, or excessive force
- Modifications, alterations, or unauthorized repairs
- Damage caused by contamination, corrosion, or improper gas supply
- Normal wear, cosmetic wear, or external damage that does not affect normal functionality
Important: A wrench should only be used to secure the regulator to the CO2 cylinder. Damage resulting from improper use of tools, excessive force, or incorrect installation methods is not covered under this warranty.
GLA is not responsible for damage caused by improper installation or use. However, repair services and support may be available for a fee.
CO2 cylinders, tubing, cartridges, and other consumable or accessory items are not covered under the regulator warranty unless otherwise specified.
For complete warranty coverage, exclusions, claim requirements, and terms, please review our Shipping, Returns & Warranty Policy.
Customer Reviews
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Outstanding build quality.
Really enjoying GLA's dual stage co2 system. I would rate it more stars if they had them available. Since replacing my old regulator things are much more stable and I no longer need to utilize a pH controller. I not use a simple Bluetooth timer to automate my co2. I can even control if from my phone in terms of turning it off or on if required. Ive been aquascaping for many years and used several co2 systems in the past. This GLA kit really stands out in many ways. The regulator is packaged like an egg. Setting up was a few minutes of bliss. I did start with a fresh new diffuser this time going with GLA's new stainless steel co2 reactor. I wish I could post pictures of GLA's co2 system and reactor in my cabinet. Its a sight of beauty. Your going to love your GLA system. You can tell they enjoy building them.
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Always buy GLA co2 systems.
Invest wisely with GLA. Superior builds,better customer service and a staff that knows aquacspaing and co2 better than anybody. I find GLA co2 systems to be much better in durability and general performance. This is my second system from GLA and could not be more happy.
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Top shelf co2 system.
Everybody who recommended this system to me was right, its super nice. GLA is top tier of co2 systems no doubt about it. If your not sure just do what I did, email them and ask. Then when it arrives to your door you will instantly know. These aint toys! GLA is A++
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GLA co2 systems are the best of the best.
3rd Gen owner here. I can attest to GLA quality co2 regulators. I have several systems in my space going on 13 years old. Recently I ordered this system and I was very excited to receive it. I was delivered promptly and everything was packed ever so neatly. You can tell GLA cares about every step. This system was very easy to install and everything is just buttery smooth in operation. I like to use mineral oil in my bubble counter so I never have to refill it. This system has been rock steady for 9 months so far and Im about to refill this cylinder any day now. The folks at GLA are top notch folks. I can only imagine the stuff they must deal with these days to bring us such excellent products to our hobby. Thank you GLA for being ever supportive of my hobby. Your products have brought many smiles into my families home.
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This is the kit.
I looked high and low and did all my research for ridiculous amount of months. Come 2022 I ordered this system from GLA. I love the co2 regulator, and all the bits it comes with. The cylinder was very new and US made as is the co2 tubing they supply so I liked that even more. It’s been flawless and my tank is bringing me so much pleasure when I need it the most. Great products and service from GLA.
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This is the best co2 regulator and service.
On an emergency I needed replacing my old co2 system. My co2art regulator chekc valve failed and flooded the regulator. I tried to clean it and purge it of water with no luck. They had no service option either so basically became trash. Super important factor GLA should advertise, you can service and rebuild a GLA regulator! First impressions, very high quality, you can feel it and visually see it. The finish is much nicer than co2art and the precision of the bubble rate is much more linear. The solenoid is very well made and the bolt design is much nicer and much more compact and finished. It also has a water tight chord grip leading to the LED. I should have went GLA from the start.
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Only way to fly is GLA.
I echo what many here say, GLAS is the way to go. Ive tried all the competing brands and GLA is leaps and bounds in quality and flow rates. The needle valve is sooooo much nicer. I love it!
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GLA PRO-DS-1 Dual Stage CO2 System (Modular)
So happy with this purchase - my first real CO2 system! Excellent customer support, excellent quality! Now I can almost see my plants growing!
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Very much a professional grade co2 system.
I found GLA through Plantedtank.net with recommendation to go with GLA for our aquascape at home. We loved the system so much we ordered another for our office aquarium at work. GLA has been an absolute blessing to work with. Highly recommended them.
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The best of the best in aquarium co2 systems.
If your reading this review you’ve landed in the right place for your co2 system. I had inquired with GLA due to an urgent need for a co2 system because my current one was struggling. I was having to monitor the co2 daily and make constant adjustments. That’s only after 3 months and do use on a brand new regulator from Amazon. Needless to say, this system is exactly what your looking for in a complete co2?system. The team at GLA assembles,test and package your co2 system in house. This in itself is quite amazing with technical products like this. They provided very clear instructions along with top shelf packaging. You can really tell GLA has there stuff together and they love co2 systems. All the tools were inside the box along with links to videos to get going. I had plenty of experience fooling with my previous model so installing this system took me only 3 minutes. Everything was just so smooth, adjusting my bubble flow rate was effortless. The sad part, my ptsd from having to constantly fool with my last co2 system, I kept going back to check it. It was rock steady say in and day out. Thank you to everybody at GLA who saved my aquascape from disaster. By and far the best customer experience of my life. I’m a fan forever.
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Go with GLA, dont be like me.
My first co2 system from co2art was total garbage. Wife is extra pissed I wasted that coin on them. Had I known about GLA prior I would have totally went with GLA. My god, the difference is night and day. People, dont be fooled because that other shit is absolute garbage in comparison. I reached out to GLA for a few basic questions, they responded quickly and were very helpful. This system is the way to go 100%. Dont be a sucker go with GLA!
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Best co2 system available.
I spent days doing my homework, at one point considered building my own. After much research GLA was the way to go. Im glad I did because its been excellent. I was not endorsed or paid to leave this review. I only wish I could attach photos of my aquascapes to this review. Save yourself the headache and go with GLA.
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Go with GLA!
My wife was super upset that I needed to replace my co2 regulator for the 3rd time. I never could afford GLA systems and always bought the low dollar equipment. Im not evcen sure why all that cheap stuff has such great reviews. They are all toy garbage. When the GLA regulator arrived I knew instantly I should have bought this years ago. Dont be a dummy and save your money. Buy GLA co2 systems. Everything else is just generic garbage.
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The best complete co2 system on the market no doubt.
Very happy to leave this review for GLA. This is my 3rd complete co2 system thats actually complete. While it doe snot come with a diffuser it has everything else. No system should come with a diffuser. Thats like giving away free shoes in a one size fits all solution. The GLA co2 system in terms of quality and ease of use gets an A+. Complete with instructions and how to videos. Many components are made in the USA and the co2 system is assembled and packaged on US soil. No other company is offering this level of service, and is why you should choose GLA.
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Beautifully made with excellent delivery co2 system
I buy now my 3rd co2 system for my aquascapes. GLA co2 system is above and beyond what I currently have. Beautiful finish, large regulator body and easy to adjust co2 flow rate. The manual provided was easily followed and no hiccups at all. Thank you GLA
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Profesional co2 system.
GLA was very helpful in getting me exactly what I was looking for. I leave on business regularly and needed a reliable co2 system. My latest business trip was the last draw for my cheap Chinese co2 system. Upon return was an absolute nightmare. Dead fish and algae were everywhere. I reached out to GLA for help and what I received was more than I could ask. I shop a lot online, like everybody else. Working with GLA was much different. You can tell when you receive your shipment before even opening it that these guys care more about what you receive than anybody else. Everything was packed meticulously and the performance of the co2 system was luxurious. I had to restart my tank completely after my disaster, but Im confident I can rest well when Im away on business. This system is 100% precision made co2 system. From the tubing,check valve and cylinder all the way to the tape on the box. Im a fan for life, so glad I found you guys :)
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The best all in one co2 system for aquascaping.
I looked at every available option and GLA always stood above the rest on every aspect. Quality built co2 system assembled in the US. The regulator and cylinder are phenomenal. The one thing these co2 systems do not come with is a co2 diffuser, but for good reason. Providing me with a basic general diffuser would not suffice because diffusers are not a one size fits all solution. Knowing that I went with a reactor for inline use and I purchased the new stainless steel canister filter GLA has and my cabinet space looks amazing. So amazing I removed the doors. Save yourself the headache and go with GLA. I pestered them with a million emails and they gladly explained everything and going as far as providing a quick Bio about GLA. They are the original goto co2 gurus. Having invented the modular manifold you have no reason to look at knock offs, because thats what the rest will be. They have terrific pricing and top notch customer support.
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The best aquarium co2 systems.
Like everybody else I shopped for days. After consulting GLA to ask them a few questions I was absolutely sure I was going with GLA. Setting up the system took me about 15 minutes because I move a little slow. Everything was absolute precision. My diffuser was blasting out co2 rock solidly now for 4 months. My tank is glowing with colorful growth and is why Im here today. To buy another co2 system, we cant wait!
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GLA has the best aquascaping supplies.
I took a long time in deciding my next co2 system. My husband was not happy with my previous budget purchased co2 system so he was very hesitant. Green leaf Aquariums eased his pain with flying colors. This system that was delivered was a professionally assembled and packed co2 system. Everything was beautiful. My husband commented right away, "Ok, this is next level sh*t". I totally agree, the GLA co2 system you can immediately tell it was built by a reputable team. The procedure for installation was easy especially with the provided instructions and videos. https://www.youtube.com/user/aquazilla You have a customer for life. Thank you from the Hughes family!
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GLA PRO - DS - 1 Dual Stage CO2 System ( Modular)
Excellent packaging, comes with everything ... Completely satisfied. Easy to setup , adjusts and runs like a charm. I had been procrastinating about what brand to buy , the choice was clear ... GLA ...
