you need something like 30-40lbs of sugar to create enough co2 over time.... assuming perfectly sealed in a 4x4 by 80" tall tent (impossible), you need at least 1/4lbs per day. Since there is a tone of waste, you better double that... and there's roughly 40lbs for 10 weeks... for a 4x4 tent at 80" tall (108 cu. ft).