Description
GLA PRO-DS Dual-Stage Planted Aquarium CO2 System
Full-size dual-stage CO2 control with a refillable cylinder and up to six adjustable outlets.
The GLA PRO-DS Aquarium CO2 System combines our full-size dual-stage regulator, a refillable 5 lb aluminum CO2 cylinder, and 10 feet of CO2-resistant tubing in one configurable package. Choose one to six independently adjustable CO2 outlets to suit your planted aquarium installation.
Each manifold outlet includes its own precision needle valve and bubble counter, allowing you to adjust CO2 flow separately for each aquarium. Dual pressure gauges provide independent monitoring of cylinder pressure and adjustable working pressure, while the integrated electric solenoid provides automatic CO2 on/off control.
Select one or two 5 lb CO2 cylinders when ordering. Every GLA PRO-DS regulator is individually inspected, pressure tested, and leak checked in the USA before shipment.
At a Glance
- Pressure Regulation: Dual-stage design
- Cylinder Connection: CGA-320 standard USA CO2 cylinders
- Included Cylinder: Refillable 5 lb aluminum CO2 cylinder
- Cylinder Options: Choose one or two 5 lb cylinders
- CO2 Distribution: Selectable 1–6 outlet modular manifold
- Independent Adjustment: Precision needle valve for each outlet
- Flow Monitoring: Bubble counter for each outlet
- Automation: Integrated electric solenoid
- Pressure Monitoring: Separate cylinder-pressure and working-pressure gauges
- Included Tubing: 10 feet of CO2-resistant aquarium tubing
Best For
- Planted aquariums of various sizes
- Aquarists who want a regulator, refillable cylinder, and tubing together
- Full-size dual-stage CO2 installations
- Single aquariums with future manifold expansion in mind
- Multiple aquariums requiring independent CO2 flow adjustment
- Aquarists who want separate cylinder-pressure and working-pressure gauges
- Automated daily CO2 operation with a timer or compatible controller
Why Choose the GLA PRO-DS CO2 System?
The PRO-DS System combines dual-stage pressure regulation, precise CO2 adjustment, dual-gauge monitoring, and expandable CO2 distribution with the convenience of an included refillable cylinder and tubing.
- Dual-Stage Pressure Regulation: Reduces cylinder pressure in two stages to help maintain consistent working pressure as cylinder pressure changes, including near depletion.
- Refillable Cylinder & Tubing Included: The system includes your selected quantity of 5 lb aluminum CO2 cylinders and 10 feet of CO2-resistant tubing.
- Configurable Modular Manifold: Choose one to six CO2 outlets based on the number of aquariums you want to supply. Compatible manifold blocks can be added later, up to the six-outlet configuration.
- Independent CO2 Adjustment: Each manifold block includes its own precision needle valve, allowing CO2 flow to be adjusted separately for each aquarium.
- Separate Pressure Gauges: One gauge displays cylinder pressure, while the other displays the regulator's adjusted working pressure. Both can be monitored independently.
- Individual Bubble Counters: Each manifold output includes a bubble counter that provides a visual reference when adjusting CO2 flow.
- Automatic CO2 Control: The integrated electric solenoid allows CO2 injection to turn on and off automatically using a timer or compatible controller.
- Integrated Protection: A pressure relief valve provides additional protection, while multi-stage stainless steel micron filtration helps protect internal regulator components from contamination.
- Durable Construction: A precision metal-on-metal valve seat and quality pneumatic components are designed for dependable long-term operation.
- USA Inspection & Testing: Every PRO-DS regulator is individually inspected, pressure tested, and leak checked in the USA before shipment.
What's Included
- GLA PRO-DS Dual-Stage CO2 Regulator
- Selected modular manifold configuration (1–6 outlets)
- 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 refillable 5 lb aluminum CO2 cylinders
- 10 feet of CO2-resistant aquarium tubing
- GLA OEM CO2 tank seal
Important: All CO2 cylinders ship empty and must be filled by a local CO2 or compressed-gas supplier before use.
What You'll Need Separately: A compatible diffuser, inline atomizer, or CO2 reactor is required for each aquarium to deliver CO2 into the water. Diffusion equipment is sold separately.
For additional protection against water backflow, we recommend a compatible inline check valve. A CO2 drop checker is also recommended for monitoring approximate dissolved CO2 levels. Additional tubing may be needed for multi-aquarium installations.
Explore CO2 Diffusers, Atomizers & Reactors
Expandable Modular Manifold System
The PRO-DS modular manifold allows one regulator and CO2 cylinder to supply multiple planted aquariums. Select the number of outlets you need from the available product options.
- PRO-DS-1: One independently adjustable CO2 outlet
- PRO-DS-2: Two independently adjustable CO2 outlets
- PRO-DS-3: Three independently adjustable CO2 outlets
- PRO-DS-4: Four independently adjustable CO2 outlets
- PRO-DS-5: Five independently adjustable CO2 outlets
- PRO-DS-6: Six independently adjustable CO2 outlets
Each manifold block includes its own precision needle valve and integrated bubble counter. This allows CO2 flow to be adjusted independently for each connected aquarium.
All outlets share the regulator's working pressure and automatic on/off schedule, regardless of the selected manifold size.
Expanding Later: Compatible manifold blocks can be added as your aquarium collection grows, up to the six-outlet configuration.
View GLA Modular Manifold Expansion Blocks
Refillable 5 lb Aluminum CO2 Cylinder
The PRO-DS System includes a refillable 5 lb aluminum CO2 cylinder with a standard USA CGA-320 connection. The cylinder can be refilled by a compatible local CO2 or compressed-gas supplier.
Choose one or two cylinders when ordering. An optional second cylinder can be filled and kept as a backup CO2 supply, allowing you to switch cylinders when the first is depleted.
Please Note: All CO2 cylinders ship empty. Confirm local CO2 filling availability before ordering.
Technical Specifications
- Model: GLA PRO-DS Dual-Stage CO2 System
- Pressure Regulation: Dual-stage
- Cylinder Connection: CGA-320, standard USA CO2 cylinders
- Included Cylinder: Refillable 5 lb aluminum
- Cylinder Quantity: One or two, selected at purchase
- Cylinder Shipping Condition: Empty
- Adjustable Working Pressure: 0–140 PSI
- Pressure Monitoring: Separate cylinder-pressure and working-pressure gauges
- CO2 Distribution: Modular 1–6 outlet configuration
- Flow Adjustment: Independent precision needle valve per outlet
- Flow Monitoring: Integrated bubble counter per outlet
- Automation: Integrated electric solenoid
- Pressure Relief: Integrated pressure relief valve
- Valve Seat: Laser-precision metal-on-metal
- Filtration: Multi-stage stainless steel micron filtration
- Included Tubing: 10 feet of CO2-resistant aquarium tubing
- Expansion: Compatible GLA modular manifold blocks, up to six outlets
- Manifold Compatibility: G2 and G3 components are not interchangeable
- Quality Control: Regulator 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
Does the PRO-DS CO2 System include everything I need?
The system includes the PRO-DS regulator, your selected manifold configuration, one or two refillable 5 lb CO2 cylinders, 10 feet of CO2-resistant tubing, and the GLA OEM tank seal. You'll also need a compatible diffuser, atomizer, or reactor for each aquarium, sold separately. The cylinders must be filled locally.
Does the CO2 cylinder arrive filled?
No. All 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?
You can choose one or two refillable 5 lb aluminum CO2 cylinders. A second cylinder can be filled and kept ready as a backup CO2 supply.
What is the benefit of dual-stage pressure regulation?
Dual-stage regulators reduce cylinder pressure in two stages rather than one. This helps maintain consistent working pressure as cylinder pressure changes, including when the CO2 supply approaches depletion.
How many aquariums can the PRO-DS System supply?
Choose from one to six manifold outlets when ordering. Each outlet includes its own precision needle valve and bubble counter for independent CO2 flow adjustment.
Can each aquarium receive a different amount of CO2?
Yes. Each manifold outlet has its own precision needle valve, allowing CO2 flow to be adjusted independently. All outlets share the same working pressure.
Can connected aquariums have different CO2 schedules?
The integrated solenoid switches all manifold outlets on and off together. CO2 flow can be adjusted independently, but the outlets share the same automatic operating schedule.
Can I add more manifold blocks later?
Yes. Compatible expansion blocks can be added up to the six-outlet configuration. Confirm your existing manifold generation, as G2 and G3 components are not interchangeable.
What do the two pressure gauges display?
One gauge displays CO2 cylinder pressure, while the second displays the regulator's adjustable working pressure. The cylinder-pressure gauge does not provide a precise measurement of remaining CO2.
Can I use different CO2 diffusers on each aquarium?
Yes. Each outlet may supply a compatible ceramic diffuser, inline atomizer, or CO2 reactor. All connected diffusion equipment must be compatible with the shared working-pressure setting.
What size aquariums can I use this system with?
PRO-DS is suitable for a wide range of planted aquarium sizes. CO2 requirements depend on lighting, plant demand, circulation, and diffusion equipment rather than aquarium volume alone.
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 system, 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
-
High Quality Construction, Reputable Brand - Worth the peace of mind
Building out my first tanks with CO2 and chose GLA because of its reputation across the hobby. Having everything needed from the regulator, modular manifolds, and tank made everything a breeze. Setup instructions online were super simple. In addition to this, I grabbed a CO2 diffuser, CO2 Drop Checker, and Check Valve and was good to go. For the tank, most places near me only do tank exchanges, versus refills. That was my only surprise. Tanks using CO2 already seeing amazing results.
-
Best co2 system for planted tanks.
I spent months comparing systems and discussing on forums and various Facebook pages and GLA always comes out on top every-time. I hooked this up to a Milwaukee ph controller and my co2 has been stable 24/7, I couldn’t be happier. My tank is now fully automated with co2,autodosing and my lights. Now all I do is weekly water changes and regular maintenance. GLA products are second to none.
-
GLA is the absolute best in the business.
Many many weeks spent researching systems and all the Facebook groups sent me to GLA. Glad I pulled the trigger because it’s absolutely a great purchase. My local stores carry a few known brands but when you get your hands on those you can’t help but think how cheesy they feel for such a premium price. For all those reading my review, here’s what I noticed. UNS,Chihiros and Fzone are all the exact same crap. Two big local stores carry them and ain’t no way I was investing into any of those for that reason. GLA is a huge upgrade all around, better quality build and materials. Customer service was fantastic and shipping was free!
-
GLA is my go-to for premium co2 equipment.
These days there are so many cheap knock offs. But this is one thing you don’t want go cheap on. GLA is the best in form and function when it comes to a lot of aquascasping supplies and they are known for co2 gear. Especially this modular solenoid system, they are the original pioneers of it all. This thing is butter smooth and operates on my tank daily without a single glitch. It’s rock steady, built strong and looks fantastic. It dwarfs all other brands by its full sized build. It’s an actual dual stage vs a fake dual stage like you see from Fzone and Co2art. All those are the same junk just rebadged toys. Don’t even bother with that crap, it’s cheap for a reason. Nothing quality comes cheap. Thank you GLA for answering all my questions and helping my wife and I along the way.
-
Pro DS Kit
Amazing product, fast shipping and excellent communication with customer service.
-
No better co2 system you can buy than GLA.
No question this is the best co2 system you can find. My LFS carries Co2art and UNS. Compared to this system those are mere toys in comparison. Weird part is they were the same price and Co2art and UNS were precisely the same dookie. The guy at my fish store even recommended to buy GLA over Co2art and UNS lol. That’s all I needed to hear. Upon set up this thing is super well made. Having the ability to see all 3 of these GLA makes a considerably larger and finer piece of equipment. I’d never second guess GLA quality these guys build a terrific regulator.
-
Best of the very best. The pinnacle in co2 systems.
You can spend all the time in the world like I did looking at co2 systems. After attending the expo in Daytona it’s a no brainer. I saw lots of competing co2 systems everywhere, Co2art,Fzone and a bunch of rebrands that looked exactly like Co2arts and Fzone. When you get a hold of a GLA regulator it’s night and day difference, big ol regulator body and the valve assembly is very nicely made. It’s on my 120cm tank and it’s rock solid everyday. The folks at GLA are also an amazing bunch, friendly and helpful. You should know, GLA invented this solenoid modular manifold system. Why go anywhere else when everybody is trying to copy their designs? That’s why I went with GLA to begin with. The OG’s in co2.
-
Awesome product
This system is worth every penny!!! It’s easy to install and I can’t even begin to tell you how wonderful the customer service experience was!! Thank you GLA for great service and products!!!
-
Gla pro ds 1
This is my first and only CO2 system so I don't have a lot to compare it again or anything for that matter and I've had it up and running for about a week so I can't actually speak to long-term durability although I don't anticipate any issues. First of all the package arrived quickly well packaged and in good shape. I am putting this on a 75 gallon planted discus tank. So I am trying to be very cautious about adding CO2 and why I chose the GLA is reviews all seem to agree they had the best needle valve. I have the system on a timer and I am introducing CO2 very very slowly. I started with one bubble every 2 seconds I'm up to about a bubble a second. I found it very easy to make these fine adjustments in the rate of CO2 flow. The regulator is very solidly built and I believe it will last a long time. If I choose to put CO2 on any of my other tanks I will get a gla regulator I don't see where the savings versus any other dual stage regulator are that significant for something that's going to last. I believe this is an excellent product and I'm very happy with my purchase
-
The best co2 system you can invest in is GLA.
I have experiance with co2 systems from Co2Art and Fzone, I can honestly say those are absolute trash. They were made more like trinkets or toys rather than a quality piece of equipment. Thats exactly what you get from GLA. Quality from top to bottom. We absolutely love the GLA system. Definitely the pride and joy of our aquarium system lol.
-
Best in the game of co2.
I don’t have to really say much, GLA is the best in co2. There is just no comparison to all the junk out there.
-
When it comes to co2 systems GLA is what you want.
There are tons of options for co2 systems but make no mistake, nothing compares to GLA quality. I’ve had many kits in my day the most recent I was using a ph controller. I’ll never use a ph controller again. Save your money and go with a Bluetooth timer. You’ll save tons of headache from constant calibrating and yearly purchase of new probes. I always thought they were necessary for stability, boy was I ever wrong and won’t be the last time either. Honestly I don’t think ph controllers hold a place in fresh water planted tanks at all. I’d love to argue this with anybody lol. The Pro DS regulator is stable as ever and effortless to maintain. Folks at GLA are amazing to work with m, you can’t go wrong with this system.
-
GLA is the original co2 regulator.
I buy only GLA co2 systems since I start this hobby in 2011. We have co2 systems on all of our aquascapes at home, work and gym. Keeping a healthy vibrant aquascape for me and my clients is paramount as we feel it brings a calming affect to our customers. GLA builds the best co2 systems bar none. You don’t want to skimp on a low grade low budget discounted co2 system when you work hard to build a vibrant water garden. We’ve never had any issues ever with GLA co2 systems and is why we always recommend them to people who ask how our aquascapes function. Yes you do have lower available options, but why skimp on quality to save a few dollars. Like my business partner says, if it’s cheap it’s because it is made cheaply. There’s no getting around that fact. We have a fortune spent on fauna and flora to skimp on the co2 systems. You’ll never get disappointed with GLA.
-
Best co2 systems.
Have used many co2 systems before and finally able to use GLA. Wow what a difference in build structure. Super performance in co2 flow rate. Very happy with GLA quality.
-
The best co2 system money can buy.
1 year of researching co2 systems for my 250g and I kept coming to GLA hammering them with questions. After almost a year of ownership I can confidently leave a review I feel is deserving. After having my hands on competitor regulators GLA’s always felt better. One thing you’ll notice is it’s notably larger in size. Not sure what’s up with that but the competing brands like Fzone and Co2art were more like vending machine toys. I get why people like them, they are cheap, and cheaply made. More so I was able to play with these at my local trade show in Daytona. There is a noticeable difference in handling, GLA does everything better. But once dry once is the moto here. Great equipment and customer service from GLA. You have a customer for life.
-
Look no further if your looking for the best co2 system you can buy.
Ive wanted this system for 2 years and I finally have one! I saw many systems at my local LFS but to my amazement they advised to buy from GLA! How often does that happen? Never! I have learned over the years GLA is the best in co2 systems. A super fine product you can immediately tell is well made. Customer service was amazing and installation was simple, I was shocked. Don't hesitate to go with GLA, they are indeed the kings of co2. Don't buy cheap because you will regret it.
-
GLA is premium co2, know that.
I bought GLA due to their highly regarded reputation. This system is top quality and superior to co2art. You simply cannot compare the two. As a previous co2art customer I can tell you without shadow of a doubt that GLA is a superior build quality. For starters it’s much larger, something is going on there. The solenoid system is simply high end, like what you would expect from a premium product. I thought that was what Co2Art was, bot was I wrong. It got the job done most of the time but was not rock steady and fluctuated with temperature changes which I found strange. I only noticed that when pulling my Apex controller reports. This is not good for a calcium reactor on a very expensive reed tank filled with $10,000 in corals and fish. I immediately contacted GLA and after discussing options this system landed at my door. I’ve had it online now for 5 months and my Apex reports are A+. Steady as a rock and reliability I can trust. You really can see and feel the difference between brands. It’s obvious GLA knows what to do as they have been around the longest. I’m thoroughly impressed. It’s likely the nicest piece of equipment in all my reef gear.
-
Superb System GLA Co2 is premium quality.
Impressive co2 system from GLA. I can attest ot its quality as the lesser quality which I have and still use as decoration only are absolute metal garbage. I dont even know whats going on with that Co2Art stuff, it just unscrews itself all over. To many issue to discuss here, but GLA really knocks it out of the co2 park I will say that. I enjoy quality goods, money well invested.
-
GLA quality through and through.
Not much to say, GLA is the best. Dont get it twisted like I did and go with GLA. You will see the difference.
-
Totally impressed.
New aquascape and new co2 system. Came to GLA to replace my old Fzone kit. People, GLA regulators are not the same as the stuff you see on Amazon and ebay. These guys obviosly know what they are doing because it just works so much better. It even feels better when you are holding it in your hand, you can feel the quality. You will not feel that with the fzone crap. Go with GLA
