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CO2 for grow rooms
Lifting CO2 above the roughly 400ppm in normal air lets plants photosynthesise faster, but only once everything else is already right: full light intensity, temperature towards the top of the range, and a room that actually holds the gas. In a tent on constant extraction the CO2 is out of the door before the canopy sees it, which is why enrichment belongs in a sealed or largely sealed room, or at least on a controller that pauses extraction while it doses.
There are three ways to get the gas in and they scale differently. Bottled CO2 through the Pro-Leaf CO2 Regulator is the controllable route, a solenoid valve on a cylinder opened and closed on demand. The Mother Nature CO2 Generator produces gas in the room from refills instead of a cylinder, which saves the trip to a gas supplier. AirBomz cans are the smallest step of all, a metered aerosol release for a single tent with no plumbing at all.
Dosing blind wastes gas, so pair the supply with a sensor. The Pro-Leaf CO2 Controller holds a set point anywhere between 400 and 2000ppm, and if you already run a Dimlux Maxi Controller the matching CO2 sensor feeds the same brain that handles your lights and climate. For sealing a room properly see air conditioning. Free UK delivery over £99. Call 020 3488 0419 if you are not sure your room is tight enough to bother.