using dry ice 4 co2

[bigmelho]

Thanks for the link, but it doesnt say anything about how expensive it is or whether you can store it for a long period of time... It also has no information concerning growing... so thanks but not really looking to do a book report on dry ice hardon.

Most supermarkets have it. its very cheap stuff, but to store it for a long time is hard becuase its frozen at -109.3°F or -78.5°C your freezer dosnt do. and some more info on plants and co2 http://biology.clc.uc.edu/courses/bio104/photosyn.htm