GLA PRO-DS-1 Dual Stage CO2 Regulator (Modular) (DIN477)

GLA PRO-DS Dual Stage CO2 Regulator (Modular) (DIN477)

The GLA PRO-DS Dual Stage CO2 Regulator (DIN477) is our full-size modular dual-stage platform for international planted aquarium CO2 installations. Engineered for aquarists seeking premium pressure regulation, expanded working-pressure capability, dual-gauge monitoring, and long-term system flexibility, the PRO-DS DIN477 can be configured for one aquarium or multiple independently controlled aquariums.

Built with premium pneumatic components, each manifold output provides its own precision needle valve and integrated bubble counter for independent CO2 adjustment. 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: DIN477 international CO2 cylinder configuration
• Regional Options: AU, EU, or UK configuration 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
• Warranty: GLA Limited Lifetime Warranty

Best For

• International planted aquarium CO2 installations
• Aquarists seeking GLA’s full-size dual-stage regulator platform
• Single aquariums with future multi-aquarium expansion in mind
• Multi-aquarium systems requiring independent CO2 adjustment
• High-tech planted aquarium installations
• Applications requiring expanded working-pressure capability
• Hobbyists who want dual gauges and modular scalability

The PRO-DS is suitable for both beginner and experienced aquarists. Its primary advantages are its full-size dual-stage architecture, expanded pressure range, dual-gauge instrumentation, and modular configuration options rather than a specific aquarium size or experience level.

Why Choose the GLA PRO-DS DIN477?

The PRO-DS DIN477 combines GLA’s flagship dual-stage regulator architecture with an international cylinder configuration and a modular manifold system that can be tailored to the number of aquariums you need to operate.

• Full-Size Dual-Stage Architecture: Designed for refined working-pressure control and long-term stability
• International Configuration: Designed for compatible DIN477 CO2 cylinder installations outside the United States
• Regional Options: AU, EU, and UK configurations selectable at purchase
• 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
• Modular Manifold System: Select from one to six independently controlled aquarium outputs
• Precision CO2 Adjustment: Each manifold block includes its own precision needle valve
• Integrated Flow Monitoring: Each manifold block 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

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 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

International Cylinder Compatibility

The PRO-DS DIN477 is designed for compatible international CO2 cylinder installations and is offered in AU, EU, and UK regional configurations.

CO2 cylinder valve standards may vary by country, cylinder supplier, and cylinder type. Please verify that your local CO2 cylinder connection is compatible with the selected regulator configuration before ordering.

If you are unsure which regional configuration is appropriate for your cylinder, please contact GLA prior to purchase for compatibility assistance.

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 DIN477 can be configured with one to six manifold blocks, allowing the regulator to support a single aquarium or a complete multi-aquarium CO2 installation from one regulator and CO2 cylinder.

• 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.

View GLA Modular Manifold Expansion Blocks

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
• 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: DIN477 international CO2 cylinder configuration
• Regional Configuration: AU, EU, or UK option selected at purchase
• 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

What’s Included

• GLA PRO-DS Dual Stage CO2 Regulator (DIN477)
• Selected 1–6 block 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 AU, EU, or UK regional power adapter
• GLA OEM CO2 tank seal

Please Note: A compatible CO2 cylinder, CO2-resistant tubing, and compatible diffusers, atomizers, or reactors are required to complete the CO2 installation and are sold separately.

Frequently Asked Questions

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.

What CO2 cylinders does the PRO-DS DIN477 fit?
This regulator is designed for compatible international DIN477 CO2 cylinder installations. AU, EU, and UK regional configurations are available. Because cylinder valve standards can vary by country and supplier, verify compatibility with your CO2 cylinder before ordering.

Can this regulator be used with a USA CGA-320 CO2 cylinder?
No. This listing is configured for international DIN477-style CO2 cylinder installations. For standard USA CGA-320 cylinders, select the CGA-320 version of the GLA PRO-DS.

How many aquariums can this regulator run?
The PRO-DS DIN477 can be configured with one to six manifold blocks at purchase. Each block provides one independently controlled 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.

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.

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.

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 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 DIN477 is our streamlined international single-stage platform for aquarists seeking compact, precise CO2 control. The DS-Mini DIN477 combines dual-stage pressure regulation with a compact modular design, while the PRO-DS DIN477 is our full-size international dual-stage platform with expanded pressure range, dual-gauge instrumentation, and modular configuration options.

Each platform is designed for a different installation style and level of system flexibility.

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.