The Chihiros CO2 Regulator Pro Limited Edition is built for serious aquascapers who demand maximum
stability and precision. The dual stage design keeps the working pressure stable even when cylinder
pressure drops, helping to avoid end-of-tank-dump and sudden CO2 spikes.
With dual pressure gauges, integrated solenoid valve and bubble counter, this regulator gives you
full control of your CO2 system. The ultra fine needle valve makes it easy to dial in a very precise
bubble rate, suitable for high-light and CO2-sensitive layouts.
The regulator is designed for refillable CO2 cylinders with EU W21.8 thread and comes with a
low-heat solenoid and EU power adapter, ready to use with timer or smart plug.
Specifications
Model
Cylinder thread
Stage type
Working pressure
Pressure gauges
Bubble counter
Solenoid
Chihiros CO2 Regulator Pro Limited Edition
W21.8 (EU standard)
Dual stage design for stable output
Approx. 0–4 bar, adjustable
Dual gauge (cylinder & working pressure)
Integrated metal/acrylic bubble counter with check valve
Built-in low-heat 12V solenoid (with 230V adapter)
Body material
Suitable for
Fine adjustment
Safety
Warranty
Anodized metal body with brass internals
Refillable CO2 cylinders (W21.8) and high-light planted tanks
Ultra fine needle valve for very precise bubble rate
Dual stage design reduces risk of end-of-tank-dump
2 years
For best results, combine with a high-quality diffuser and use a timer or app control to run CO2 only
during the lighting period. Always check for leaks and monitor livestock when adjusting CO2 levels.
