BIO2 CO2 Enhancement is an allnatural CO2 Enhancement system proportioned for use with 5x5-foot grow tents. It is the perfect solution to avoid the high costs associated with CO2 bottles, burners, and meters. The BIO2 system will raise carbon dioxide to optimal levels weekly via the standard temperatures maintained in indoor garden environments. BIO2 uses no electricity, produces no heat, and adds no humidity, making it the perfect accessory for your garden. The greatest advantage of the BIO2 CO2 Enhancement system is the health benefits and harvest weight increases of your favorite plants.