Octopus Deluxe Dual Gauge Regulator

Perfect for calcium reactor and Freshwater Plant CO2 injection applications - It can provide a consistent bubbling rate from as low as 10 bubbles / min and up. This is more than sufficient for most aquaristic applications. But if you require something even more refined & precise, you may upgrade its Precision Needle Valve to a Metering Valve. Features: Most compact & sturdy construction Solid chrome-plated gas regulator & pressure reducing valve assembly Dual gauge pressure indicators Industrial-grade Precision Needle Valve (upgradable to Super Precision Metering Valve) Integrated 110V Solenoid (Magnetic) Electrical Valve Compatible with various sizes of US & Canada CO2 Cylinders (from 12 oz to 20-lb).