Wow! a pound of sugar a single packet of yeast? I used yeast method when i had a live aquarium with live plants. But that requires alot less than in air. i used a 2 liter bottle with 3/4 cup sugar and 1 tsp of yeast. maybe you could do the math to mix multiple batches at once? but i diffused it in the tank with an airstone. had to stir the bottle once a day and change out every 5 days. maybe with a co2 tank along with the yeast method could work but i dont think it would be enough for a grow over 4' x 4' without a ten gallon drum..