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Chihiros CO2 Regulator Pro with Solenoid

CO2 Systems

Chihiros CO2 Regulator Pro with Solenoid

Injected CO2 is the single biggest lever in a planted tank, and the regulator is where it succeeds or fails. The CO2 Regulator Pro pairs dual gauges — cylinder pressure on one, working pressure on the other — with a low-power 12 V DC solenoid so your CO2 can switch off with the lights, plus an integrated bubble counter with check valve so you can see and set your exact injection rate at the cylinder.

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Technical details

GaugesDual — cylinder pressure + working pressure
Solenoid12 V DC, low power, timer/controller ready
Safety valveAuto-release above 100 PSI (≈ 6.9 bar)
Cylinder threadsCGA320 and W21.8
Bubble counterIntegrated, with built-in check valve
App controlVia Chihiros controller (sold separately)

In detail

Dual-gauge CO2 regulation with a 12 V solenoid and built-in bubble counter — the dependable heart of a pressurised system.

Two gauges, zero guesswork

The first gauge reads what is left in the cylinder; the second reads the working pressure you are feeding the tank. You will see an empty cylinder coming a week away and keep injection rock-steady in between.

Chihiros CO2 Regulator Pro with Solenoid — Two gauges, zero guesswork

A solenoid that earns its power draw

The 12 V DC solenoid runs cool, sips power and shuts the gas off the moment its timer or smart plug cuts out — no CO2 wasted overnight, no morning pH crash. Wire it into a Chihiros controller and it joins the app schedule alongside your light.

Chihiros CO2 Regulator Pro with Solenoid — A solenoid that earns its power draw

Safe on the big fittings

A precision safety valve vents automatically above 100 PSI, and the body fits both CGA320 and W21.8 cylinder threads — the two standards you will actually meet on refillable CO2 bottles. The bubble counter’s built-in check valve keeps tank water out of the works.

Chihiros CO2 Regulator Pro with Solenoid — Safe on the big fittings

Frequently asked questions

Which CO2 cylinders does this regulator fit?

It carries both CGA320 and W21.8 threads — the two standards you will meet on refillable aquarium CO2 cylinders in South Africa. Check your bottle’s valve marking before ordering.

Why do I want a solenoid valve?

Plants only use CO2 when the lights are on. The 12 V solenoid lets a timer or Chihiros controller shut the gas off automatically at night, saving gas and preventing overnight pH swings.

What happens if the pressure gets too high?

A built-in precision safety valve vents automatically above 100 PSI (about 6.9 bar), protecting the system and your tank.

More in CO2 Systems

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South Africa's leading pet and aquarium store since 2007 — with Chihiros lighting, CO2 and dosing gear available from Fourways, aquascapers at the counter, and easy ordering from anywhere in the country.

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