The FunGuy CO₂ Generator Bags

FunGuy CO₂ Generator Bags provide a controlled biological method of CO₂ supplementation for enclosed grow spaces such as hydroponic tents and greenhouses. By utilising a specialised fungal strain and a highly refined organic substrate, these bags deliver a stable, sustained release of carbon dioxide without the complexity or cost of traditional CO₂ systems.

How It Works

Inside each bag is a carefully selected mycelial culture designed for vigorous colonisation and high CO₂ output. As the fungi metabolise the substrate, they consume oxygen and release carbon dioxide as a natural by-product of respiration. This process runs continuously, offering a steady supply of CO₂ directly into the growing environment.

A gas-exchange filter patch on the bag enables consistent CO₂ diffusion while maintaining internal sterility, protecting the culture from external contaminants.

Installation & Placement

For optimal dispersion, position the FunGuy CO₂ bag above the plant canopy. Because CO₂ is denser than air at equal temperature and pressure, it will settle downward over your plants. Adequate internal air movement is recommended to distribute the CO₂ evenly and prevent stratification at floor level.

Performance & Lifespan

Each FunGuy CO₂ bag remains active for up to six months, depending on environmental variables such as temperature and airflow. To maintain more consistent CO₂ concentrations, a staggered replacement schedule is recommended:

• Month 0: Install the first bag

• Month 3–4: Introduce a second bag

• Month 6: Replace the original bag and continue the rotation

This method helps smooth out the natural decline in CO₂ output over time.

Mycelial Colonisation

The substrate will gradually shift in appearance from brown to white as the mycelium develops. This is expected behaviour and indicates successful colonisation and active CO₂ generation.