Description
GLA PRO-DS-2 Dual-Stage CO2 Regulator (2-Block Modular Manifold)
Dual-stage CO2 control for two aquariums, with room to expand.
The GLA PRO-DS-2 Aquarium CO2 Regulator combines dual-stage pressure regulation, precise CO2 adjustment, and automatic operation in a full-size design. Its two-block modular manifold allows you to supply two planted aquariums from a single regulator and CO2 cylinder.
Each manifold outlet includes its own precision needle valve and bubble counter, allowing CO2 flow to be adjusted independently for each aquarium. Dual pressure gauges provide separate monitoring of cylinder pressure and adjustable working pressure.
Compatible manifold blocks can be added later to support up to six aquariums. 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: Two independently adjustable CO2 outlets
- CO2 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
- Expansion: Modular manifold supports up to six aquarium outlets
- Warranty: GLA Limited Lifetime Warranty
Best For
- Two planted aquariums sharing one CO2 cylinder
- Aquarists who want independent CO2 adjustment for each aquarium
- Planted aquariums of different sizes or CO2 requirements
- Full-size dual-stage CO2 installations
- Multi-aquarium systems with future expansion in mind
- 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-2?
PRO-DS-2 combines dual-stage pressure regulation, two independently adjustable CO2 outlets, 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.
- Two Independent CO2 Outlets: Supply two planted aquariums from one regulator and CO2 cylinder, with separate flow adjustment for each aquarium.
- Precise CO2 Adjustment: Each manifold block includes its own precision needle valve, allowing you to fine-tune CO2 delivery for different aquarium requirements.
- Separate Pressure Gauges: One gauge displays cylinder pressure, while the other displays the regulator's adjusted working pressure. Both can be monitored independently.
- Expandable Modular Manifold: Start with two CO2 outlets and add compatible manifold blocks later to supply up to six aquariums from one regulator and cylinder.
- Individual Bubble Counters: Each manifold outlet includes a bubble counter that provides a visual reference when adjusting CO2 flow to its 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-2 includes two modular manifold blocks, each with its own precision needle valve and integrated bubble counter. This provides two independently adjustable CO2 outlets.
Both aquariums share the regulator's working pressure and automatic on/off schedule, but CO2 flow can be adjusted separately for each aquarium.
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
- PRO-DS-2: Two independently controlled CO2 outlets (included)
- 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
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-2 Dual-Stage CO2 Regulator
- Two-block modular manifold
- Two precision adjustable needle valves
- Two integrated bubble counters
- 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 for each aquarium are required to complete your CO2 installations. 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-2 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: Two modular manifold blocks
- Standard CO2 Distribution: Two aquariums
- 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
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.
How many aquariums can PRO-DS-2 supply?
PRO-DS-2 includes two manifold outlets for two aquariums. Compatible expansion blocks can be added later to supply up to six aquariums from one regulator and CO2 cylinder.
Can each aquarium receive a different amount of CO2?
Yes. Each manifold outlet includes its own precision needle valve, allowing you to adjust CO2 flow independently for each aquarium. Both outlets share the same working pressure.
Can the two aquariums have different CO2 schedules?
The integrated solenoid switches both manifold outlets on and off together. CO2 flow can be adjusted independently, but both aquariums share the same automatic operating schedule.
Can I use different CO2 diffusers on each aquarium?
Yes. Each outlet may supply a compatible ceramic diffuser, inline atomizer, or CO2 reactor. The regulator's working pressure is shared, so both diffusion devices must be compatible with the selected pressure.
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 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 aquariums can I use PRO-DS-2 with?
PRO-DS-2 can supply planted aquariums of various sizes. CO2 requirements depend on lighting, plant demand, circulation, and diffusion equipment rather than aquarium volume alone.
Does PRO-DS-2 include a CO2 cylinder?
No. This listing includes the PRO-DS-2 regulator, two manifold blocks, 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
Limited Lifetime Warranty: GLA CO2 regulators are covered against qualifying defects in materials and workmanship for the original purchaser. Coverage is non-transferable, requires proof of purchase, and is subject to proper installation, use, and maintenance. GLA may repair, replace, or issue store credit for qualifying claims.
Return Policy: Pressurized CO2 equipment is non-returnable and non-refundable. Qualifying defects are handled separately through warranty support.
Warranty Exclusions: Coverage does not include improper installation, misuse, excessive force, unauthorized repairs or modifications, contamination, corrosion, accidental damage, or normal wear. Damage from improper wrench use is excluded. Cylinders, tubing, cartridges, and other accessories are not covered under the regulator warranty unless otherwise specified.
For complete terms, exclusions, and claim requirements, please review our Shipping, Returns & Warranty Policy .
Customer Reviews
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Best of the best in co2 systems.
My second GLA regulator for my new basement scape. Cant ever go wrong with GLA, a superior build quality and reliability. My old one is 13 years old!
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Big upgrade from Co2art.
Many frustrations were had using Co2art. This has been such a blessing with GLA. Everyday it’s right where I left it. No fictions and no poor craftsmanship. My first Co2art regulator was warrantied out of the box. The alignment of everything was off by 1/4” making everything sit crooked. Then my second unit they sent would not hold bubble rate no matter how many times I adjust the needle valve or psi. Since setting up this GLA regulator it’s held steady since day one. I love the quality and fine needle valve precision. I’m a fan!
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I’d never buy anything less than GLA
If you don’t know by now and you are reading my review you should know GLA is a premium brand. All the other brands are just knock offs and cheaply made. Why people choose that cheap junk like Co2art or Fzone is unbelievable. I’ve owned both those brands and they are total garbage. And for what you pay for those is even worse. It’s a night and day difference with GLA and I won’t use anything less for my aquascapes. Buy once cry once they say.
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GLA co2 regulators are the only way to go.
I’ve owned quite a few knock off regulators like Fzone and UNS. Those two brands are exactly the same manufacturer with different branding. GLA set themselves apart when they invented this technology, and the regulator body is a beast in comparison to those two. Very well made and a precision needle valve is what you want and GLA delivers.
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Best of the very best.
GLA is the panicle of co2 systems and this is my second regulator from GLA. I just gave my old one to my dad. This is even nicer than my old version and has been butter smooth everyday. No fooling around with nothing, it just does its job effortlessly. It’s like a trusty workhorse everyday.
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This is undoubtedly the best when compared to the rest in the field.
You will be very pleased with the quality of this co2 regulator. It’s a higher quality regulator than Co2art, which I’ve replaced with this regulator. I quick notice you’ll see the body of the regulator is significantly larger. It’s much longer like what you would see with a lab grade dual stage. I know this detail because we use them with our co2 lasers at my practice. You can not only notice its quality construction but the delivery in precision is there. Very satisfied with this co2 regulator and should have went to GLA to begin with. Thanks David for helping fix our situation. GLA is in a class of its own.
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GLA is the pinnacle in co2 delivery systems.
I think this is my 3rd co2 regulator and I feel is my last. First two were knock offs of HLA’s work and while they put out co2 they didn’t do it with the level of accuracy I get from GLA. You just can’t compare these with the likes of Co2art or Fzone, those two are just generic as it gets. I still have them, and they will be listed on marketplace this week. GLA is top class gear and now I know why everybody recommends them.
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Very easy to use and works great!
So far I’m loving it. It’s super easy to install and use. I’m new to using C02 in my aquarium so when I first set it up I thought it was defective when I unplugged the solenoid and the bubbles didn’t stop immediately. But GLA customer support is excellent, I texted the customer support number to ask about it and they responded immediately and explained that it can take up to 5 minutes for the bubbles to slow down and stop after it’s unplugged. I appreciate their customer support as much as their great products!
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Top tier in co2 regulators.
If you are reading my review it’s because you landed on aquascapers best co2 regulator. This isn’t bias, it’s just a fact. My original GLA regulator from 2007 would be working today except movers decided to “misplace it”. These guys the originator of this modular co2 regulator system. My old one was made of brass fittings. I watched GLA years ago develop this manifold system. Then as the knocks off copied them the cheap stuff started rolling out. I’ve seen them at my LFS and there is no comparison between GLA and the knock offs. You get precision quality and a big ol regulator body vs the janky flat body toy looking ones. I was honored to buy the upgraded dual stage manifold system. Best of the very best.
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GLA is the very best in aquarium distribution.
Coming from a Co2art regulator I can confirm GLA is the premium brand. I’ve even used lesser quality than Co2art before that and they’ve all broken in short time, gave me issues with constant adjustments. Today I come to buy a second unit for our office tanks. Everything is higher quality, needle valves, solenoids everything. You’ll be glad you chose GLA.
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The only way to fly is GLA co2.
Always happy to use GLA for my co2 systems. This is my 3rd install for my client and this system was nothing short of stellar. Smooth operation and high quality to match.
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GLA is the best co2 regulator.
If you’re looking for the best co2 regulator you have landed on it. Don’t settle for cheap imitations and save yourself the headache. A true gem in co2 systems from GLA.
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No substitutions.
Go with GLA co2 equipment and you won’t have any issues. These guys are the very best in the business. It’s a thing of beauty.
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Without question GLA makes the best.
This is without question the best quality regulator money can buy. Dont be hammed by the cheap stuff, this is the best in so many ways. Its a big full sized regulator, blows my old Co2art regulator out of the water. The whole thing is built with fine quality I can feel in my hands. This is real pneumatic equipment.
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GLA or nothing.
My second regulator purchase, almost a decade after the first. I will always return to GLA for my planted tank gear.
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I love it.
Love the build and smoothness of the needle valves, not sure how to describe that lol. We have a bunch of regulators in use for our fish room but GLA stuff is always nicer. It’s weird because so many people don’t realize what you’re missing until you have it. Now I know.
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GLA is the best.
Buy once and go with GLA. So dissapointed in myself not going sooner. Their whole kit is amazing. Love the form and finish. I echo many of sentiment.
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Superb in every way.
I chose GLA due to the quality throughout. They are the utmost best in co2 delivery and I was sick of having tech issue's with Co2art. I even tried using an alternate to Co2Art and odly enough it was the same EXACT thing as co2art only a different sticker. Nonetheless both were complete garbage. Im confident now that people dont know what quality co2 flow looks like. GLA knocked it out of the park with their full size regulator.
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The best of the best is GLA co2.
Spare no expense and go with GLA. This is a performance based product, no9t a price point co2 regulator. This is a feature rich regulator built with reliable components and GLA's original manifold. Nobody else compares, I said it now fight me! lol JK Jk
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Super High Quality Regulator
I love my GLA CO2 regulator. I've had it for a few months now and its performance and reliability are second to none. Thank you GLA for making such a great regulator.
