The Glass Aqua Pro CO2 Kit is a complete, high-performance CO2 system designed for planted aquariums of all sizes. Built around Ultum Nature Systems Cylinder Pro and Pro Dual Stage Regulator, this combo delivers consistent, long-term CO2 injection to support healthy aquatic plant growth, vibrant coloration, and tank stability.

Available in multiple cylinder sizes, this system scales from small to larger aquariums and multi-tank setups, offering a reliable and efficient solution for hobbyists ready to move beyond simpler CO2 options.

What This Kit is Best For
- Medium to large planted aquariums
- High-tech planted setups with demanding aquatic plants
- Long-term CO2 use with refillable systems
- Multi-tank setups (with manifold expansion)
- Hobbyists upgrading from paintball or cartridge-based CO2 setups

Product Highlights
- Refillable CO2 Cylinder System: Provides a long-term, cost-efficient solution with refillable cylinders available in multiple sizes.
- Dual-Stage Regulator Performance: Ensures stable and controlled levels, reducing fluctuations and supporting consistent plant growth.
- Scalable Design: Attach manifold blocks for supplying CO2 across multiple aquariums with a single regulator and cylinder.
- Flexible Size Options: Choose from 2.5lb, 5lb, 10lb, or 20lb cylinders depending on tank size and system needs.

What’s Included
- UNS Dual Stage CO2 Regulator (Mini regulator included with 2.5lb kit)
- UNS CO2 Cylinder (shipped empty)
- CO2 Tubing
- CO2 Diffuser

Choosing the Right CO2 Kit Size

Refillable CO2 systems provide a more consistent and efficient carbon source compared to disposable cartridges. Once filled, cylinders can last significantly longer depending on tank size and usage, reducing downtime and ensuring your tank doesn’t skip a beat! Final usage and depletion rates will vary based on aquatic plant density, injection rate, and aquarium size.

Important Information
- Cylinders are shipped empty and must be filled before use
- Compatible with standard CGA-320 CO2 fittings
- Refilling services are commonly available at local gas or welding supply stores