Aquarium CO2 Regulator for Planted Tanks: Dual Gauges, Dual-Stage Stability and Two Included Manifolds

Give a medium or large planted aquarium a steady, expandable pressurized CO2 setup. This dual-stage aquarium CO2 regulator suits long-term systems using refillable cylinders, whether you care for one aquascape or an expanding fish room.

Two gauges keep working pressure and remaining cylinder pressure visible, making everyday checks straightforward and giving you time to plan a refill before the cylinder runs low.

Key Features

• The dual-stage fail-safe prevents end-of-tank dump, keeping CO2 levels more stable and reducing sudden fluctuations as the cylinder empties.
• Two included bubble counter manifolds distribute CO2 from one cylinder across multiple planted aquariums, simplifying a shared supply setup.
• Additional manifolds can be added as your aquarium collection grows, supporting up to eight recommended splits from one cylinder.
• Compatibility across standard 2.5LB to 20LB CGA-320 refillable cylinders gives aquarists a practical long-term alternative to disposable options, offering longer refill intervals and lower operating costs.
• The anodized Space Grey finish gives the regulator a clean appearance beside planted-tank equipment and cabinetry.

Specifications

• Brand: UNS
• Regulator type: Dual-stage
• Gauges: Working pressure and remaining cylinder pressure
• Finish: Anodized Space Grey
• Cylinder connection: CGA-320
• Compatible cylinder capacity: 2.5LB to 20LB
• Included manifold count: 2 bubble counter manifolds
• Recommended expansion: Up to 8 splits
• Tubing compatibility: CO2-proof tubing
• Diffuser compatibility: Aquarium diffusers and inline diffusers
• Included adapter: CGA-320 adapter
• Included accessories: Power adapter, assorted replacement O-rings and installation tools

Choose this regulator for a dedicated planted-aquarium system when the greater size of a refillable-cylinder setup suits your space. Its pressure monitoring, dual-stage protection and expandable distribution make it a practical foundation for consistent long-term CO2 management.