Pro-Leaf CO2 Regulator for Grow Room Enrichment

The simplest way to hold CO2 at the level plants actually want

The Pro-Leaf CO2 Regulator fits straight onto a CO2 gas cylinder and uses a solenoid valve to release gas on demand. It takes its orders from the Pro-Leaf CO2 Controller, opening only until the room reaches the pre-set ppm figure or the set time elapses, which keeps levels where you want them without ever tipping into the danger zone. Get it right and you get faster growth, larger plants and a noticeably better harvest.

Key Benefits

• Solenoid control opens and closes the valve automatically, with no manual input.
• Holds the optimal 1000-1200ppm band when paired with the Pro-Leaf CO2 Controller.
• Built-in safety logic - the valve shuts at the pre-set limit or time, preventing toxic levels building in the room.
• Higher heat tolerance for your plants, which is useful in summer when temperatures run away.
• Fits standard CO2 cylinders, a simple bolt-on for a sealed or semi-sealed room.

Why Does Growth Stall in a Sealed Room?

Air sits at roughly 360ppm of CO2, and a healthy canopy can strip that out within an hour. Once levels drop below 200ppm growth slows badly whatever your light, feed or airflow - photosynthesis runs out of raw material, and you get slow growth and low yields you cannot explain. Extraction helps, but plants perform better on more CO2 than the atmosphere provides. Above 2000ppm CO2 turns toxic to plants, and 4000-5000ppm is dangerous to people, which is why controlled dosing beats guesswork.

How to Use

Fit the regulator to a charged CO2 cylinder and connect it to the Pro-Leaf CO2 Controller. Set your target between 1000ppm and 1200ppm and position the controller's sensor at canopy height, away from the gas outlet. Only enrich during the lights-on period, and time extraction so you are not venting the CO2 you have just paid for. Never enter a room that is actively dosing at high concentration, and check the cylinder pressure regularly so the system is not running empty mid-cycle.