great thread guy's...I am starting this experiment...I know Smoker(by the way, I have grown 2 of his strains. The sexy orange skunk; Is some trippy chitman!!!), and, if he likes this method, then I say try it...as Zandor stated, anything above 300ppm is wonderful for your plants...thanks.lw

I can't wait to try this! I am getting around 1/2g per watt...without Co2. Later.lw
latewood Reviewed by latewood on . cheap and easy CO2 I read this in a school science site. To make cheap CO2 use vinegar and egg shells. Crush egg shells and put in a plastic container, then pour vinegar over egg shells. I took a one gallon water jug, drilled a 1/4 inch hole in the top and plugged one end of 1/8 inch black tubing. Then stuck holes along the tubing for the gas to escape. Hang tubing near the top of plants, since gas is heavy. Easy and cheap. Replace vinegar when mixture stops bubbling. Rating: 5