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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The best of the best!
Super impressed, very high quality and a level of precision we can stay satisfied with. Do not confuse GLA with anything else on the market because have own them. GLA is simply better quality.
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Green Leaf Aquariums superior co2 system.
Many systems had over the decades, some work meh others barely at all after only a few months. I now have GLA co2 system 1 year 8 months and it’s unbelievable. Superior quality and craftsmanship. Customer service was pleasant and will be doing long term business. Buy GLA
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Top of the line co2 system.
I already have one co2 system in place from GLA's competitor. it still works, however I do have to wrestle it which is not my favorite. So I decided to go with GLA, and now I see what the fuss is about. Its a different ball game entirely, finer precision in the needle valve, better psi adjustments which to me was a game changer. It is so smooth to operate. More importantly a lot of the stuff is US made and designed, all the way to the GLA co2 tubing. The GLA regulator is one of thos piece of equipment you just want to take care of and know it has your back with repeatability and reliability. Its a high quality piece of the OG's of co2 system.
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Buy GLA Co2 System.
I made the mistake of buying cheap from Amazon, nightmare situation. Noting worked well, caused havoc in my aquarium due to poor quality in the build. After getting in touch with GLA and receiving my system, its been night and day. Works so smoothly, no BS customer support. The new era in support where they dont put up with no bull crap lol.
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We are in love with GLA, aquarium products of course lol.
We are big fans of GLA and this system has done amazing things for our aquascape. Its looks brilliant under the tank and has done wonders for our plants. GLA has us hooked!
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Highly recommend GLA Co2 systems.
Pleasant experience with GLA. Very friendly staff with speedy delivery. Upon receipt, packaging was exceptional, something you can appreciate these days. We filled the cylinder and were up and going the next day. We use the GLA co2 reactor and could not be happier. If your looking for high quality co2 system you cant buy on Amazon look no further, this is the real deal. Thanks GLA
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So glad I went with GLA.
After spending what felt like forever planning my 120cm tank and researching and emailing every vendor who would help with with co2. GLA stood tall amongst the rest. Real quick, I work in product development fora a fortune 500 company and there are a few things to remember. You cant put a price on experience and knowledge. That means GLA has more years of knowledge about co2 systems and how they fit in every scenario. I learned that GLA paved the way for what you see in co2 systems today. I even verified this with their Facebook page, and you really have to scroll back years to see it. GLA is the pioneer of the modular manifold co2 system. Everything else is just a replica of their work. I can relate to this in a big way, obviously. Knowing all this is why I chose GLA, the original true full sized dual stage regulator and modular manifold system. I went to a few LFS around the city and I was able to take my GLA regulator with me to compare it to the in-store brands. I can say this with 100% clarity, there is no comparison. GLA is full sized with two internal diaphragms. PSA! I saw Fzone,Co2-Art,UNS, all 3 of these were exactly the same to eachother. These were very tiny regulators I was surprised so many wan to use them(cheap). To me they looked like something you win in a vending machine lol. You just have to hold them in your hand to see what Im relaying in this review. If you ever look at those cheap knock off brands, you will notice they are the exact same, flat and cheap. Thats the very best way to describe them.
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Top of the line
Decided to spring for the industries best and I’m glad I did. Setting up my first CO2 system ever for a 40g planted tank. David and the team at GLA provided top notch service including customizing the color of my CO2 tubing and mailing a missing price of the order at no charge (I was fully transparent that I couldn’t find the part and was not sure if I accidentally discarded it or it wasn’t included in the shipment. They took care of it without any issue). I’m fully confident that this setup will last for a lifetime! Many thanks to the team at GLA
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Thank you GLA!
I will try to make this short but sweet because GLA customer service was exceptionally patient and nice to us. We needed a system in a hurry because we recently setup our 2023 IALPC aquascape and was reading for photos when we noticed our drop checker was not moving beyond blue, it was before and all the sudden it was not. We contacted the company we ordered from but there was a delay because we did not realize they were international(not US based). Once communication was underway they sent a replacement and all was good, so we thought. $ days later we started to experience the same issues with the co2art regulator. This time however the solenoid was not receiving power no matter what we did. After much frustration we gave up and put the regulator to bed with all of our other aquarium garbage. Fast forward to now because we were about to call it quits. My husband has spent tens of thousands on this aquascape at 180cm and time was running out. When the GLA system arrived we knew right away, this was quality. The GLA system is not even remotely the same category of co2 system. The best way I can describe this is better said by my husband. In his words, Co2art is a blatant knock off of GLA's superior product. Whats more strange is we dont know why so many told us to go check out Co2art, its been absolute garbage and in our opinion a waste of global resources. After drooling over the GLA system its been up and running everyday without a hiccup. My husband even polishes the GLA system under our tank(full Infinite filter,reactor and DS system). Its his pride and joy and we are honored to support GLA, the original US based company who invented everything you see. Dont be misguided like we were, go with GLA you will not regret it.
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Aquarium Co2 System
Loving our GLA co2 system. I was referred to from Planted Tank Forum.https://www.plantedtank.net/forums/ I was clearly frustrated with my Co2art co2 regulator and the people the pointed me here. Now this is only my second co2 system, and I would not consider Co2art a co2 system. Especially after having the GLA to see first hand. GLA is so much better quality all around. You can clearly see the build structure alone with GLA is much nicer than co2arts. I now have trouble free co2 in my house. Folks, buy once and go with GLA, because all the stuff they have is nice!
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This is the best co2 system for aquariums.
I have an electronic carbon doser and its an absolute shitbox. I then purchased the Co2Art regulator, yet another shitbox. I now have several shitbox regulators that hold no candle to GLA. When I got the GLA I just knew the fight was over. Whatever GLA has built in this regulator its doing it right! Ultra butter smooth flow control va absolute madness. With the Co2Art every time the temp changed in the room the bubble rate would change, WTF! This GLA regulator is wayyyy bigger and is 100% a more substantial build. Don't settle for a shitbox, buy GLA!
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This is the best co2 system available.
This is not my first but I have a feeling it will be my last. I have a collection of co2 systems since being in the aquarium hobby from the Dupla days. I also have many of GLA competing brands in my house so this review is well merited. My experience with GLA was like no other, from customer service to delivery, which was processed exceptional fast. Arrival of the package I could tell I was in for a treat because GLA packaging was very nice, its was pretty. GLA tape was even nice! Opening the regulator I could tell right away what I was working with. GLA regulators dwarf all their competitors in terms of actual size. GLA seemingly has a legit non-toy like regulator. Extremely well made and the design is flawless. As a veteran in co2 I was set up in minutes, and let me tell you. The system is butter smooth, none of the Amazon or Ebay specials compare because I have those, and you know who Im talking about. Kudos to GLA for staying true to what aquscapers are looking for. Stay innovative GLA we love you guys!
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GLA is the super co2 system.
I love this regulator, no gimmicks and very solid. Much larger than my crappy one and so much better performance. This system was a good buy and has been solid since day one. I do nothing to it, only clean it to keep is shiny and new. I like the US representation with many US made products that come along with the system. Everything arrived packaged very professionally, nothing like amazon. Purchasing from GLA was an absolute pleasure, great company with fantastic support.
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Go with GLA co2 systems.
It only took me one mistake to know I should have gone with GLA from the start. The support system and experience left me refreshed after my previous with a GLA competitor. I dont know much about co2 systems but there is one thing I noticed about this co2 system compared to my other one. It has a level of finesse that just oozes quality. My bubble control was leaps and bounds in easy control. I may not know co2 systems very well but I can tell you GLA co2 systems are worth every penny. You simply will not get the same quality and service with anybody else. Just like GLA told me, stick with the pioneers of this system and you will be left extremely happy.
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GLA is the best of the best in co2 systems.
Just retired my Amazon co2 regulator for this epic GLA system and boy, what a difference. This regulator is built much more substantially than my 2 previous co2 regulators. Its literally 3x the size and feels like a real piece of equipment. My Fzone regulator felt like a paperclip and would not hold a steady bubble rate without daily human interference, I hated it since day one. After installing GLA co2 system I knew right away, it was a blessing. Its been handsfree ever since, we love it!
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Top shelf co2 system from GLA.
Very satisfied with GLA and GLA products in general. New house required all new hardware and must be of best quality and its presence must be appealing. GLA co2 system checked all these marks and is worthy of a 5 star review. I have a long history with co2 system and this space required the best and this is it. Much higher quality regulator body and valve system. Cleaner less bulky design. The solenoid, very very nice. They incorporated a clear housing using a liquid tight chord grip. IP67 all the way. Stainless steel gauges and high quality cylinder with present dating good for 5 years. The tubing we received per our spec in grey color was a nice touch to the installation. Our opening is next month and the space looks terrific. We added the GLA stainless filter and co2 reactor and it is the best. Go to GLA, they are the real pioneers of this new generation of manifold co2 system.
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One bad ass co2 system.
What can I say, its GLA. This kit is super nice. Very well made all around. Lots of American ingenuity from GLA. Fantastic warranty but I doubt I will need it. This thing just pumps out co2 with ease and without any intervention on my part at anytime until time to refill. Over the years I have used many co2 systems. This year is my second GLA system because I loved the warranty and my old 2008 system from GLA. These guys just know what they are doing. They invented this concept of modular co2 systems so aint nobody better at knowing them inside and out like GLA. Because all the others are just riding GLA's coat tails.
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Big upgrade from my co2art regulator.
I just upgraded the tank and filter and at the time was already having issues with my co2art regulator. I was debating sending it back to Europe for repair but the cost was astronomical. After talking with friends at our local fish/plant club I was referred to GLA. I dont know why but this GLA regulator is so much larger than the co2art regulator in all directions. Makes it feel like your using something of substance, vs the more toy like feeling with co2art. It felt like it came out of a vending machine and that would explain its cheap cost and functional issues. This GLA regulator handles everything so much better. I dont mess with it at all but Im always looking at it to make sure its not spazzing out. If your looking to upgrade look no further.
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The best of the best.
The best co2 regulator Ive ever used. Easy to install, silky smooth operation and rock steady.
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Premium quality co2 system.
We spent a few weeks looking over options and in the end went with GLA. After contacting customer support discussing our requirements we landed here. This is a very well put together system. Granted it does not come with a diffuser, its for good obvious reasons. Everything in the box was very well packed, like when you mom packed your lunch box. Everything was just neatly nested. It took us only a few minutes to install and had co2 in the plant beds in no time. Its been working superb for going on 9 weeks now. I keep is clean with a microfiber cloth with some plant based stainless steel cleaner. It helps keep the dust off and keeps nice and shiny new looking. Its the nicest piece of aquarium equipment we own and our tank is 180g. Thanks GLA!
