Ok Scot I made that Co2 Generator. Took about 3 minutes with stuff I had laying around. Just drilled a hole in the lid just a bit smaller than some tubing I had. I shaved down the end of the tubing and held it under hot water to get it soft and pushed into the hole. It fit snug so I don't think I need any kind of sealant. Dumped in some Big Chief and some warm water and mixed up. Poured in some regular baking yeast and added some yeast nutrient just cause I had it laying around. In just a few minutes it putting out a bubble every three seconds. I'm gonna let this flow over one of my seedlings and see what happens. According to this site I should double the growth rate.
The Heartland Institute - Environment & Climate News Article
