Thanks for the reply's have been out of town and just got back I am in a 4x4x7 tent so to small for a generator, so I am thinking of running a tank with a regulator and a valve that holds the ppms at 1000,run to air hose at back of fan. I hadn't seen much on here about it but had been doing some reading on it and everything I read seemed positive
I believe you should only use CO2 if everything in your grow-room is maxed out!
If done in a professional way it can increase your growth up to 25% and reduce grow time by 20%!
The problem using C02 is that you have to keep your CO2 gas contained in your growroom but get the heat and humidity out!
So this means you need some serious complicated system that will cost alot!
A decent device to monitoring your CO2 concentration will cost you around 1500 dollars!
For the most people its not worth to even try it!