Exhale produces Co2, 24 hours a day with no need to refill bottles or use expensive Co2 production units. The power of Exhale lies in the mycelial mass inside the vented cultivator. This mycelial mass cultivates Co2 and the one-way breather patch releases Co2 continually for up to 6 months.
Exhale comes complete and there is no need to turn it on or off, simply place Exhale in your grow space and leave it alone to do its job. 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.
Please note this price is for the standard size bag not the XL.