ExHale comes complete and is cultivating CO2 even before you get out of the checkout line. No need to turn it on or turn it off, simply place ExHale in your grow space and leave it alone to do its job.
A continuous shower of CO2 directly onto your plants is the most efficient way to deliver CO2. Placing the ExHale Cultivator slightly above the level of your plants will insure they receive the CO2 they need 24 hours a day for up to 6 months.
The ExHale Cultivator is designed for small to medium grow spaces, or more specifically 1 ExHale Cultivator will provide 4-6 plants with the CO2 they need. Works great in 4x4 grow tents or smaller.