http://www.insidesun.com/index.php?a...12&prevstart=0 <------- There's your bat guano... pretty cheap, reliable website. As for the co2... pick up a few packets of dry active yeast, mix 1/4 a teaspoon of it in 1 liter of water. Put on the cap then shake until the yeast is fully dissolved, and add 2 cups grnulated sugar, put on cap, and shake again... then add 1/2 liters more warm water and give one final shake.... two or three of these in the growroom *during light hours only* will dramatically improve growth rate and yeild.. also http://boards.cannabis.com/showthrea...6&page=3&pp=25 theres a short tutorial i made to help turtle get some fresh air in his grow room.... you can do this with as little as a desk fan and several household items :thumbsup: