Alright, I was hoping to learn about co2 production...for now, ill just show you some experiments I have been able to make to feed the little girls.
Photos:
first is of all three different methods, one being yeast in sugar water that has a tube that goes into saltwater so the bacteria dies and the room remains sterile, second being a milk jug filled with baking soda used as a basin whose lid is glued to a water bottle which contains vinegar (there is hole drilled through the lids that are glued together)...the water bottle has a tiny hole at the bottom of it, so when flipped upside down, flow stays constant and the vinegar can funnel it's way down to the baking soda which reacts to produce co2 which is piped next to the plants.......long explanation. and lastly there is the last which has more detailed pics, you can figure it out, same baking soda and vinegar reaction...

2nd shot of holes for co2 to travel through in pot.
3rd is of same bottle from second method (upside down) filled w/ vinegar
4th is of whole contraption in full functioning mode...
lets in light.....
co2 supply......
paper filter to allow air transfer(good or bad?)......
notice how it is propped up so it is as close as possible to light (used cigarette box for props).........(you can tell if you look real close in last pic...lol)
i think thats everything.
peace
-mjm