What about a simple bottle of sugar water with yeast and a cotton wool bung to elevate CO2 in a grow tent ?, have you done any measurements using yeast fermentation ?
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What about a simple bottle of sugar water with yeast and a cotton wool bung to elevate CO2 in a grow tent ?, have you done any measurements using yeast fermentation ?
Yeast's also a fungus. Should work and be much more controlable than oyster mushrooms.
Yep I did that method for a long time, its works well if you do not mind the smell..
https://peakd.com/science/@solominer/c02-production-experiments-sugar-and-yeast