Description
GLA PRO-DS-1 Dual-Stage CO2 Regulator (Modular Manifold)
Full-size dual-stage CO2 control with dual gauges and expandable outlets.
The GLA PRO-DS-1 Aquarium CO2 Regulator combines dual-stage pressure regulation, precise CO2 adjustment, and automatic operation in a full-size design. Two integrated gauges allow you to monitor cylinder pressure and adjustable working pressure separately.
PRO-DS-1 includes one modular manifold outlet for a single planted aquarium. Compatible expansion blocks can be added later, allowing one regulator and CO2 cylinder to supply up to six aquariums with independent CO2 flow adjustment.
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 Manifold: One independently adjustable CO2 outlet
- CO2 Adjustment: Precision needle valve
- Flow Monitoring: Integrated bubble counter
- Automation: Integrated electric solenoid
- Pressure Monitoring: Separate cylinder-pressure and working-pressure gauges
- Expansion: Modular manifold supports up to six aquarium outlets
Best For
- Planted aquariums of various sizes
- Aquarists who prefer full-size dual-stage pressure regulation
- Single aquariums with future expansion in mind
- Multi-aquarium installations using additional manifold blocks
- Aquarists who want separate gauges for cylinder and working pressure
- Automated daily CO2 operation with a timer or compatible controller
- Installations requiring adjustable working pressure for different CO2 diffusion equipment
Why Choose the GLA PRO-DS-1?
PRO-DS-1 combines dual-stage pressure regulation, precise CO2 adjustment, dual-gauge monitoring, and modular expansion in one regulator. Here's how its features benefit your aquarium installation.
- Dual-Stage Pressure Regulation: Reduces cylinder pressure in two stages to help maintain consistent working pressure as cylinder pressure changes, including near depletion.
- Separate Pressure Gauges: One gauge displays cylinder pressure, while the other displays the regulator's adjusted working pressure. Both can be monitored independently.
- Precise CO2 Adjustment: The included manifold block features a precision needle valve for fine control of CO2 flow to your aquarium.
- Expandable Modular Manifold: Start with one CO2 outlet and add compatible manifold blocks later to supply up to six aquariums from a single regulator and cylinder.
- Individual Bubble Counters: Each manifold block includes a bubble counter that provides a visual reference when adjusting CO2 flow to a connected aquarium.
- 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.
Expandable Modular Manifold System
PRO-DS-1 includes one modular manifold block with its own precision needle valve and integrated bubble counter. This provides one independently adjustable CO2 outlet.
If you add more planted aquariums, compatible manifold blocks can be installed to expand your existing PRO-DS regulator.
- PRO-DS-1: One independently controlled CO2 outlet (included)
- PRO-DS-2: Two independently controlled CO2 outlets
- PRO-DS-3: Three independently controlled CO2 outlets
- PRO-DS-4: Four independently controlled CO2 outlets
- PRO-DS-5: Five independently controlled CO2 outlets
- PRO-DS-6: Six independently controlled CO2 outlets
Each manifold block has its own precision needle valve and bubble counter. All outlets share the regulator's working pressure and solenoid-controlled operating schedule, while CO2 flow can be adjusted independently for each aquarium.
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
What's Included
- GLA PRO-DS-1 Dual-Stage CO2 Regulator
- One-block modular manifold
- Precision adjustable needle valve
- Integrated bubble counter
- Integrated electric solenoid
- Cylinder-pressure gauge
- Working-pressure gauge
- GLA OEM CO2 tank seal
What You'll Need Separately: A compatible refillable CO2 cylinder, CO2-resistant tubing, and a diffuser, inline atomizer, or reactor are required to complete your CO2 installation. These items are sold separately.
Need a cylinder too? Explore our GLA PRO-DS Complete CO2 System, which combines the PRO-DS regulator with a refillable aluminum CO2 cylinder and CO2-resistant tubing.
Technical Specifications
- Model: GLA PRO-DS-1 Dual-Stage CO2 Regulator
- Pressure Regulation: Dual-stage
- Cylinder Connection: CGA-320, standard USA CO2 cylinders
- Adjustable Working Pressure: 0–140 PSI
- Pressure Monitoring: Separate cylinder-pressure and working-pressure gauges
- Included Manifold: One modular manifold block
- Standard CO2 Distribution: One aquarium
- Multi-Aquarium Expansion: Up to six manifold outlets
- 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
- Expansion: Compatible GLA modular manifold blocks
- Manifold Compatibility: G2 and G3 components are not interchangeable
- 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 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.
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 PRO-DS-1 supply multiple aquariums?
Yes. PRO-DS-1 includes one manifold outlet, but compatible expansion blocks can be added to supply up to six aquariums from one regulator and CO2 cylinder.
Can each aquarium have a different CO2 flow rate?
Yes. Each manifold outlet has its own precision needle valve, allowing CO2 flow to be adjusted separately for each aquarium. All outlets share the same working pressure.
Can each aquarium have a separate CO2 schedule?
The integrated solenoid switches all connected 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 GLA modular manifold blocks can be added. Make sure the expansion blocks match your existing regulator generation, as G2 and G3 components are not interchangeable.
What size aquarium can I use PRO-DS-1 with?
PRO-DS-1 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.
Can I use an inline atomizer or CO2 reactor?
Yes. PRO-DS supports common planted aquarium CO2 diffusion methods, including ceramic diffusers, external inline atomizers, and compatible reactor systems.
Does PRO-DS-1 include a CO2 cylinder?
No. This listing includes the PRO-DS-1 regulator, single manifold block, integrated components, and GLA OEM tank seal. A compatible 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 product and even better customer service
I knew absolutely nothing about CO2 for aquariums and GLA got me completely squared away, put up with my dumb questions, and handled every issue I had without a single hiccup. Customer for life now. Don't hesitate to buy, you will be in good hands
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we will see
out of the 4 regulators I have purchased now 5 3 have gone bad both my dual manifold regulators from other manufacturers both went out in about 90 days first thing I noticed is this is substantially beefier than the other two, which were almost Identical dials didnt feel flimsy little things like ensuring the relay can tuck nicely along the unit displays were nice and solid needles were precise and not twitchy workmanship alone is miles above my other two so in 90 days we shall see maybe I will remember to pop back in if not remember no news is good news
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Great product and very precise
I've tried a few different regulators and this is the one I know i can rely on. IT's so precise and the knobs are so smooth. Will recommend.
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Best in the game.
Best regulator in the hobby without question. Customer service should hold a class for all others to learn from because it’s every bit of amazing. Thank you once again GLA.
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Facebook recommendation was right!
Per a few Facebook groups who read my plea for help with my crappy Fzone regulator a bunch of members advised to go with GLA, and let me tell you, it’s premium grade vs the cheap crap I wasted money on. It’s true what they say, buy once cry once and by gosh this co2 system is very nice. You notice it immediately upon taking it out of the box. Thoroughly enjoyed chatting with Noah at GLA who helped me decide on this. Bought a few other bits and couldn’t be more pleased. It’s a high quality regulator with easy operation that is indeed buttery smooth!
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There is only one premium co2 system and it’s GLA.
I’ll say it again, there is only one premium co2 system and it’s GLA. You can take your time looking at Co2art,Fzone, Chihiros or any of those other brands and they all have the same thing in common. All are exactly the same just different colors. They should be embarrassed honestly. GLA is the OG original in co2 delivery because they are the pioneers of this solenoid system. If anybody knows how a solenoid and manifold should be built, it’s GLA. Much better construction and materials used in all aspects of the build of the regulator. The needle valve is rock solid and built to last you forever and what I like most is everything is serviceable at home. Now I know why the warranty is amazing. If you don’t use this to hammer nails into wood it will last you forever. GLA will always have your back with support because they recently freshened up my old regulator from 2008. They sent it back looking brand new I was so happy. Thank you GLA and staff for always being there for my scapes. Cheers, Miguel.
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Ain’t no substitutions for the best.
Don’t settle for less or cheaper options, you’ll just end up later here buying this. GLA outperforms Co2Art or Fzone. There’s no substitution for high quality and those fake brands don’t even compare.
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There is no better co2 system on the market.
You can buy a cheap regulator anywhere, but why? People like to think these Fzone regulators are great. I’m here to tell you they are not and they will waste days of your life with constant adjusting. So then you thought CO2Art was a better choice just to find out it’s the same exact garbage just a different color and even worse because it cost me more. Yes, that was me and my wife is very pissed off at me for all of it. I told her that GLA was my last one and if it doesn’t work out I’ll quit the hobby. Well, fast forward 6 maybe 8 weeks now since I’ve installed and haven’t even touched it, although I did dust it off with a microfiber cloth. I did that because I was so proud of my GLA regulator. I felt accomplished like I finally did something right. The build quality of GLA is a night and day difference from these knock off brands. The precision of delivery is unbelievably steady. No psi adjusting no needle valve adjusting no nothing. Just rock steady. My wife doesn’t see me yelling at the regulator in frustration anymore, there is peace now at water change day. The day I dreaded most because that’s when I’m investigating crap the most. Now, it’s just peace and doing other projects and no troubleshooting hours wasted. Thank you GLA for bringing peace to my household and making a fantastic product.
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Sooo much nicer than my old junk.
After a complete crash in my scape I decided to rebuild and swap my co2 system out for GLA. My current co2 system wasn’t even old it was only 4 months old Co2art Pro SE. it turned into absolute dookie after only a few months. The bubble counter broke, then the psi adjustment knob fell completely off. My husband was looking at it and he noticed the stem that connects to the cylinder wasn’t even installed correctly. The hole where it threaded into the body was off by a 1/4” or so. I never noticed but sure as heck it was angled all weird. This GLA regulator has been perfect right out of the box.
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Always top shelf with GLA CO2 regulators.
This is the absolute best of the best in co2 equipment. My local fish shop only had Co2art and a few other brands. After having my hands on them giving them a good once over I chose not to go with those. Even the guy at the store told me to buy GLA. I forgot see GLA in action at Aquashella, abd after seeing it and playing around with it I knew it was the one. It’s do much larger,heavier and the function of the needle valve in its control was much nicer. Just nicer all around with that cool solenoid system. So glad I bought this!
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Perfect regulator
Bought it in 2023, still going strong 2 years later.
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Impressive co2 regulator.
By recommendation from a Facebook group I took the plunge to replace my Ultum Nature Systems regulator. I was going to replace it with Fzone and noticed both were exactly the same. Not sure what’s up with that but what a waste of money those things are. Looks were very deceiving. What looked nice turned out to be recyclable trash. This GLA DS is 100% leaps and bounds in quality and precision of delivery. Couldn’t be happier with GLA.
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GLA PRO-DS-1 Dual Stage CO2 Regulator
Very precise adjustability. Movement is very smooth. Quality all the way. Just wish I bought a second manifold and bubbler.
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CO2 Regulator
The regulator has been great. Very easy to set up.
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Outstanding co2 regulator
With many frustrations with Fzone and Co2Art I finally tried GLA. Now I see what all the fuss is about. This is premium quality co2 equipment that I had no idea existed. Far superior to the other two brands which should come at no surprise to you why they are cheap. You get what you pay for and GLA sets the standard, guys the valve is amazing. Save yourself headache and go with GLA. Thank you GLA staff!
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GLA PRO-DS-1 Dual Stage co2 regulator
Bubble counter is user friendly and regulator works perfectly.
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If you are reading this review, buy this co2 regulator.
I work for the NOAA Fisheries : Department of Commerce. We strictly use GLA for our lab for research. GLA has always been the pinnacle of a quality co2 system that we need for our research. Very high quality equipment you can count on and customer service like no other experience. Don’t settle for less if you’re serious about your aquascapes.
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Don’t settle for cheap buy a GLA co2 regulator.
I only have experience with Fzone co2 kits which are absolute garbage. Yes, those are cheap but damn it man they are built like junk. Do you really want junk holding 1000psi? Of course not, and when GLA arrived at our home we knew right away it was top quality. Everybody knows what quality feels like in our hands, everybody knows. Fzone was total recycled aluminum cans whereas GLA feels like a tank in your hands. The delivery of co2 is precision delivered. Everyday it’s stable and I don’t have to mess with it. I love it so much my wife makes fun of me because I’m always dusting it clean and shiny. Why not?! It’s beautiful and I’m proud to own a GLA regulator.
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I’d never buy anything less.
Long story short the movers lost/stole my old GLA co2 system. Mind you I bought it from GLA in 2006! Almost 20 years old and still worked like a champ. Wish I still had it! Anyways fast forward to few weeks ago I bought this beast. Once again amazing quality. I could have bout cheap stuff on Amazon or my LFS, abd I can say with certainty those are all garbage, because my LFS was selling them all. Tin cans, or takes at that’s what they felt like. GLA builds the real deal and you get what you pay for. Absolutely love it!
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Best of the best.
Truly honored to finally have a true co2 regulator. My previous co2 regulator from Co2Art was a dud, or at best worked for a few months. Never was steady and gave me persistent issues they could not resolve with troubleshooting. Tired I took the plunge with GLA, what a difference you see and feel right away. The regulator itself is much larger than Co2art so I’m not sure if that’s the difference. The valve portion seems far superior. I’ve not had to touch it is weeks it’s very steady. If you are in the market for a co2 regulator GLA is the only way. Superior quality and the warranty can’t be beat.
