Exhale Standard CO2 Bag Mushroom Homegrown Natural CO2 Generator Grow Bloom

Maintenance Free: No heat, No electricity, Just CO2. It can be used for both vegetative plant growth as well as for fruit and flower production. How to use Exhale CO2 Bags. No need to turn it on or turn it off, simply place it in your grow space and leave it alone to do its job.

eBay