The professional CO2 regulator from Dymax RX-123 precisely regulates CO2 injection for both freshwater and saltwater aquariums. This lightweight aluminum regulator is corrosion-resistant, helping to protect the device from external elements. The setup process is quick and easy, requiring no tools to connect to the CO2 cylinder. Key features:

• High precision
• Hand-tightenable
• Lightweight
• Corrosion-resistant
• Low heat generation
• Multi-directional valve