GLA GRO Cartridge Aquarium CO2 Kit

GLA GRO Cartridge CO2 Kit

The GLA GRO Cartridge CO2 Kit is a compact, cartridge-based CO2 system designed for nano and small planted aquariums where space, simplicity, and clean installation are priorities. Using a 74g disposable CO2 cartridge, the system provides pressurized CO2 control without requiring a full-size cylinder installation.

Built around the GLA GRO regulator platform, the kit combines precise CO2 adjustment, automatic operation, integrated flow monitoring, and a heavy-duty aluminum cartridge base in a compact configuration. An included CGA-320 adapter also allows the regulator to be used with standard USA refillable CO2 cylinders, providing additional flexibility as aquarium needs change.

At a Glance

• Pressure Regulation: Single-stage
• Primary CO2 Source: 74g disposable CO2 cartridge
• Refillable Cylinder Compatibility: CGA-320 standard USA CO2 cylinders using the included adapter
• Pressure Monitoring: Integrated working-pressure gauge
• Output Pressure Range: 0–70 PSI
• Standard Configuration: Single aquarium
• Automation: Integrated electric solenoid
• Warranty: GLA Limited Lifetime Warranty on the regulator

Best For

• Nano and small planted aquarium installations
• Desktop aquariums and minimalist aquascapes
• Installations where a full-size CO2 cylinder is impractical or undesirable
• Aquarists seeking a compact pressurized CO2 system
• Hobbyists who want the option to transition to a standard refillable CO2 cylinder later
• Beginner and experienced aquarists who prioritize simplicity and clean installation

The cartridge configuration is particularly well suited for aquariums with lower CO2 consumption. For larger or higher-demand systems, the included CGA-320 adapter allows the regulator to be transferred to a standard refillable CO2 cylinder.

Why Choose the GLA GRO Cartridge Kit?

The GRO Cartridge Kit combines the compact convenience of disposable CO2 cartridges with the precision components and control features of a full pressurized aquarium CO2 regulator.

• Compact Cartridge Configuration: Provides pressurized CO2 without requiring a large cylinder
• 74g Cartridge Capacity: Larger cartridge format provides greater capacity than many smaller disposable cartridge systems
• Precision CO2 Adjustment: Fine-control needle valve allows careful tuning of CO2 output
• Automatic Operation: Integrated solenoid allows CO2 injection to be controlled by a timer or compatible controller
• Integrated Flow Monitoring: Bubble counter provides a convenient visual reference for CO2 delivery
• Backflow Protection: Integrated check valve helps protect the CO2 system from aquarium water backflow
• Heavy-Duty Aluminum Base: Provides a stable platform for the cartridge installation
• CGA-320 Versatility: Included adapter allows the regulator to be installed on standard USA refillable CO2 cylinders

Precision Control & Automation

The GRO Cartridge regulator combines a precision needle valve, electric solenoid, integrated working-pressure gauge, and bubble counter into a compact assembly designed specifically for planted aquarium CO2 use.

The needle valve provides fine adjustment of CO2 flow, while the solenoid allows injection to be automatically coordinated with the aquarium photoperiod using a timer or compatible controller. The integrated working-pressure gauge provides a clear visual reference for regulator output pressure, and the bubble counter provides a convenient repeatable reference when tuning the system.

Bubble rate should be treated as an aquarium-specific reference rather than a universal CO2 measurement. Actual CO2 requirements vary with aquarium volume, plant mass, lighting, circulation, diffusion efficiency, and surface agitation.

Cartridge Convenience with CGA-320 Flexibility

The GRO Cartridge Kit is designed primarily around the compact 74g disposable cartridge configuration, making it especially convenient for nano aquariums, desktop installations, and locations where a larger CO2 cylinder may not be practical.

Unlike a cartridge-only regulator, the included CGA-320 adapter allows the GRO regulator to be installed on standard USA refillable CO2 cylinders. This provides a clear upgrade path if CO2 demand increases or if the regulator is later moved to a larger aquarium installation.

• Use the included 74g disposable CO2 cartridge for compact installations
• Transition to a standard refillable CO2 cylinder using the included CGA-320 adapter
• Continue using the same GRO regulator when changing CO2 source
• Choose the cylinder configuration that best fits the aquarium and available installation space

Engineering & Performance

• Laser-Precision Metal-on-Metal Valve Seat: Engineered for consistent regulation and long-term operation
• Multi-Stage Micron Filtration: Helps protect internal pneumatic components
• Precision Needle Valve: Provides fine CO2 flow adjustment
• Integrated Working-Pressure Gauge: Provides a visual reference for regulator output pressure
• Integrated Electric Solenoid: Enables automatic CO2 operation
• Integrated Bubble Counter & Check Valve: Provides flow monitoring and backflow protection
• Durable Aluminum Regulator Body: Compact construction designed for planted aquarium use
• Heavy-Duty Aluminum Cartridge Base: Provides stability for the cartridge configuration
• USA Inspection & Testing: Each regulator is pressure tested and leak checked prior to shipment

Specifications

• Primary Installation: 74g disposable CO2 cartridge
• Alternate Installation: CGA-320 standard USA refillable CO2 cylinder using the included adapter
• Pressure Reduction: Single-stage
• Pressure Monitoring: Integrated working-pressure gauge
• Output Pressure Range: 0–70 PSI
• CO2 Distribution: Single aquarium

What’s Included

• GLA GRO Cartridge CO2 Regulator
• Integrated electric solenoid
• Integrated working-pressure gauge
• Precision needle valve
• Integrated bubble counter with check valve
• 74g disposable CO2 cartridge
• Heavy-duty solid aluminum cartridge base
• CGA-320 adapter for installation on standard USA refillable CO2 cylinders

Please Note: CO2-resistant tubing and a compatible diffuser, atomizer, or reactor are required to complete the CO2 installation and are sold separately.

Frequently Asked Questions

How long does a 74g CO2 cartridge last?
Cartridge lifespan varies significantly depending on aquarium size, CO2 injection rate, photoperiod, diffusion efficiency, and overall CO2 demand. Nano and smaller planted aquariums generally consume less CO2, which is why the cartridge configuration is best suited for these installations.

Can the GRO Cartridge Kit be used on a larger aquarium?
Yes. The cartridge configuration is designed primarily for nano and small planted aquariums, but the regulator itself is not limited to the 74g cartridge. The included CGA-320 adapter allows the regulator to be installed on a standard USA refillable CO2 cylinder for greater capacity and versatility. For larger or higher-demand systems, a full-size cylinder or another GLA regulator platform may be the more practical configuration.

Can I switch from cartridges to a refillable CO2 cylinder later?
Yes. The included CGA-320 adapter allows the GRO regulator to be transferred from the 74g cartridge configuration to a standard USA refillable CO2 cylinder without replacing the regulator.

Do I need anything else to use the kit?
Yes. CO2-resistant tubing and a compatible diffuser, atomizer, or reactor are required to deliver CO2 into the aquarium and are sold separately.

Can I use a diffuser, inline atomizer, or CO2 reactor?
Yes. The adjustable 0–70 PSI output allows the regulator to be configured with many planted aquarium CO2 delivery methods when operated within the pressure and flow requirements of the selected equipment.

Is the GRO Cartridge Kit suitable for beginners?
Yes. The compact cartridge configuration provides a straightforward introduction to pressurized planted aquarium CO2 while retaining precise adjustment, automatic solenoid control, integrated pressure monitoring, and the component quality expected from GLA equipment.

CO2 Cartridge Refills

Replacement 74g CO2 cartridges are available separately, making it easy to replace the cartridge when depleted and return the system to operation.

View 74g CO2 Cartridge Refills

Choosing the Right GLA CO2 Platform

The GRO Cartridge Kit is our compact cartridge-based platform for nano and space-conscious planted aquarium installations, with the added flexibility of CGA-320 refillable cylinder compatibility. The standard GLA GRO provides a streamlined CGA-320 single-stage platform, the DS-Mini combines compact dual-stage pressure regulation with modular expansion, and the PRO-DS is our full-size dual-stage platform with expanded pressure range, dual-gauge instrumentation, and modular configuration options.

Each platform is designed for a different installation style, CO2 source, 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: Always follow the installation instructions for the specific CO2 cylinder or cartridge configuration being used. Damage resulting from improper installation, improper use of tools, excessive force, or incorrect assembly 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.