i strongly disagreenot really, you need a steady 1500ppm to see a reasonable result. You'll only get that in a sealed, regulated room.
I am using this product here and am very satisfied. It is basically like your yeast setup but it is all ready to go and all you do is add sugar water and setup the valve and replace some sugar water every 10 days. I am happy. CFLs too.
CO2 CREW - (link)
looked like a basic setup in a paint mixing can. how long are the microrganisms supposed to produce?
I like your style!I bought 40lbs of molasses for $15. I use it on my plants and to generate C02 for my aquarium and tent. All of the byproduct is twice distilled into 180 proof rum $15 of molasses makes several gallons.