Should I put together a CO2 solution for my grow room. I've heard 6 cups of sugar + 1/2 Gallon of water and 2 TBSP's Yeast. I've heard if you put it all in a gallon milk jug and cap it with a small hole @ the top each time you shake it you get a decent dose of CO2...Any truth to this? Also do any of you use CO2 in your grow room? If so what do you reccomend?

Peace.