GLA PRO-DS Dual Stage CO2 System (Modular)

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.