timbeallnd
Member
I've been doing some testing of the Exhale CO2 grow bags. So far I'm pretty disappointed, because of other bloggers totally false information. Based on what I have seen each grow bag only adds about 100 ppm CO2 after 1-2 weeks inside of a CO2 tent - when the plants are SMALL. Once the plants get bigger the measured CO2 ppm versus outside the tent ambient is basically a net decrease versus letting in small leakage of air through the bottom and circulating with fans. I have a 100% LED setup, and heat levels never kick on the exhaust - only about 2-3 minutes of every hour does the exhaust kick on for humidity. I recently added an additional 2 of the std size exhale C02 bags, and I believe my total CO2 is averaging about 150-200 ppm CO2 higher. Which means that you may only get 50-75 ppm extra per exhale bag? Overall I think they help - as long as I continue to see an increase over ambient CO2. However the people posting that it adds 500 CO2 per grow bag seem to be not telling the truth at all.
