diy co2 gen

I have been doing research on the benefits of adding CO2 to your grow room. I decided that it looked like a fun project and hopefully, I will see some benefits of adding it. I didn't have the money for a proper CO2 setup so I figured I'd try this hillbilly version. If anyone has any experience...

Ok I would like to hear from all you growers from expert to novice. Pix inclued would be greart so those can have a step by step deeraction on how to build one. I know there many differnt way but I would love to see them all. Not just for me but other growers to. If there and advice on up...