Co2 Art PRO-SE Series Dual Stage Regulator

If you want vibrant growth without babysitting your bubble rate, this is the one. The PRO-SE’s dual-stage design keeps output pressure consistent as the cylinder empties, helping prevent end-of-tank pressure spikes and keeping livestock comfortable while plants feast.

Setup is delightfully simple: plug in the safe 12 V DC solenoid to your timer, dial in the ultra-precise needle valve, and watch the included bubble counter do its thing (with built-in check valve to stop backflow). Twin gauges make it easy to read cylinder and working pressure at a glance.

Performance is tuned for planted tanks big and small. With adjustable working pressure up, it pairs beautifully with ceramic diffusers, inline atomisers, or reactors for crisp, consistent CO₂ delivery and that coveted “glass-clear, pearling at lights-on" look.

Most importantly for local hobbyists: this is the W21.8 thread — the AU/NZ Type 30 / EU standard. In short, it fits standard refillable CO₂ cylinders across AU, NZ, and Europe. No adapters, no guesswork, just connect and scape.

Key Features

- Dual-stage construction for stable output (helps prevent end-of-tank dump)
- Integrated 12 V DC solenoid for timer-controlled dosing
- Ultra-precise needle valve for smooth, repeatable adjustments
- Bubble counter with in-line check valve included
- Dual gauges: cylinder (high) working (low) pressure
- Adjustable working pressure up to 40 PSI (≈ 3 Bar)
- Thread: W21.8 / Type 30 / BS341 No. 8 / DIN 477 (AU/NZ/EU standard)
- 5-year CO₂Art manufacturer warranty

Tip: Start CO₂ 1–2 hours before lights on, and aim for a gentle lime-green drop checker by peak photoperiod.

Built for aquascapers who want function and form in perfect harmony.