Hi dutc -- came across an old post of yours (2009, I believe?) in which you were searching for a strain of fungus that produces lots of CO2 for use in a homemade style Exhale bag. Wondering if you ever found that? I too am a fungus cultivator at times and have all the tools/knowledge necessary to make a strong mycelium. Wondering if you ever found out which strain will work for this purpose? Thank you!