CO2 controllers take the guesswork out of CO2 dosing — set your target PPM and let the controller run your regulator or generator automatically. Precision gear from AC Infinity, Pro Leaf and Digi-Lumen, shipped Australia-wide.
CO2 Controllers for Automated, Set-and-Forget Dosing
The full CO2 controller chain in one range
Controllers, regulators and sensors that work together: pair the Pro Leaf PPM-B1 with its matching regulator, add the CO2 + Light Sensor to an AC Infinity Controller AI+, or run CO2 alongside temp, humidity and VPD with the Digi-Lumen Enviro-Pro.
Set your PPM once, let it hold
Each controller monitors actual CO2 levels and only doses when they drop below your target, so you burn less gas and keep plants in their sweet spot without babysitting a timer.
Sized by growers who actually run CO2
14 years of growing experience behind every recommendation. Not sure whether your room seals well enough for supplementation? Ask before you buy — we'll tell you straight if it won't pay off.
Shop the rest of your environment setup: grow room environment control, environment controllers and grow room monitors.
FAQs
Can I run CO2 with just a regulator?
Yes — a regulator on a timer works, but a controller reads actual PPM and only doses when levels drop, so you waste less gas and hold a steadier range.
What PPM should a CO2 controller be set to?
Most growers run 1,000–1,500 PPM under strong light. Ambient air sits around 400 PPM, so a controller is the only reliable way to hold an elevated target.
Does CO2 supplementation work in a vented tent?
No — CO2 needs a sealed or minimally vented space. If your exhaust runs constantly, most of the gas is pulled out before your plants can use it.
Growers First, Retailers Second
Welcome to The Grow Guys
We built The Grow Guys from the soil up — well, coco and perlite. Before we sold gear, we bought it, ran it, and learned the hard way what's worth the money and what ends up in the shed. That's the filter everything on our shelves passes through. No sales scripts, no rebadged junk, no telling you what you want to hear. Just gear we'd run ourselves and advice from people who actually grow. Chasing higher yields, tighter flowers, or your first harvest? You're in the right place.
FAQs
Calculated at checkout by weight and destination. Free shipping over $499*.
Order by 2pm and it ships the same business day from Invermay, Tasmania.
500+ products across 40+ brands, every one filtered through 14 years of real growing experience. Shipping Australia-wide.
30-day change-of-mind returns on unopened, unused products. A 10% restocking fee applies and return shipping is at your cost.
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