Pro-Leaf CO2 Controller & SensorThe Easy Way to Maintain Perfect CO2 Levels The Pro Leaf Controller makes optimising carbon dioxide levels as simple as possible. Just plug it into a power socket and plug your CO2 source (either a burner or bottle) into the Pro Leaf. You can then monitor CO2 concentrations and automatically maintain optimal levels. With a built in light sensor, the Pro Leaf will even stop dosing during dark periods. This is a highly impressive piece of kit that will