Now at Piensa en verde, you can find the Unis CO2 controller, manufactured by Ecotechnics.
This controller is a controller designed to inject carbon dioxide from a CO2 bottle.
It also has an adjustable internal timer, allowing different settings for different sized grow rooms. Setting it is as simple as plugging in the controller to both the socket and the CO2 bottle, and set the timer according to the grow room size.
This controller comes with very straightforward instruction manual, which will allow you to install the equipment within minutes.
CO2 supply should always be during the day cycle, so it is recommended to connect it to the same timer as the lighting equipment.