DIY co2 controller if you own thermostat.

[Micsog]

all you need is this

1-Co2 tank 30lb
1-low pressure tank regulator
1-1/4" parker solenoid valve 12v
1-photo switch from lowes
2-rechargable 9v batteries - wired in series-
1-cheap solar battery charger

when the lights are on it charges the 9v when the lights go out it turns the solenoid on and releases Co2

[demoreal]

that will turn co2 on and off when fans go out. if so that is pritty cool way better than my idea. i will figure out how that works. thanks. or does that just turn co2 off when lights go off?

[demoreal]

seems like that would be the same thing. you still need a little light to go on outside the grow room. cause i created a system that turns co2 on when fans are on and off when fans off.
(in a un teck little kid way)

[Micsog]

thats just for my Co2 my fans run 24/7 an i got my Co2 bottle in the room because a warm Co2 bottle lasts longer an i forgot i have an expansion chamber for pb guns to help with that even more

[demoreal]

right on cool.