EZ CO2 XL Delay Activated CO2 Producing Mushroom BagDescription Natural Carbon Dioxide Supply: EZ CO2 provides a safe and economical method of offering your plants with carbon dioxide (CO2). The CO2 is produced naturally and constantly by a non fruiting mycelial mass (fungus) housed within the product, sustained by organic matter for an estimated 6 months. Symbiotic Relationship with Plants: The fungus forms a cooperative relationship with the plant, taking in the oxygen released by the plant and