Pot loves air,,, the more the better. As far as ventilation , earth has 300 ppm for free, and the plants take o2 and turn it in to co2 at night.
Venting at night is a must, and should start when the lights go out.
There two ways to go for co2
co2 gen , cheap with natural gas, a little more with propane.
co2 tanks , do not heat up , but heavy to lift up, I do a lot of welding, so supply is not hard. (tig and mig welding) Or you drink a lot of sodas a real lot of sodas.
The systems are worht every cent. speaking from a larger system.
You also have the problem with need extra heat to use the co2.
The co2 monitor is tits when charted on a recorder , you find out real fast how goinging the room jacks up the co2.
Without knowing the amount of co2 from the co2 water , size of the room, leaks in the room, temp, its all a good guess at best.
Also co2 fall like a rock and distance to the plant, upward movement, temp differential.
With out meters, controlers , its a peek a Booo system.
Plant "here come a human, there a gas as long as they breath"
Human " Ok you little bitches I'm going to was you with soda"
Plant " Yep human still breathing , if he rubs my stalk we will make his finger stink.
Plant " wont the human be supprised if 1/2 of us are males and he's playing with our hard sticks"
Human " What in the hell is going on that plant got balls and it came all over my hand"
Plant " O damn hes going to jurk us out , or was that off"
Now think once you get the system down , you will have all females, Now what kind of logic is that"
:dance: :thumbsup: