CO2 on a timer

[steppedinds]

I decided to hook up an old co2 tank in my tent and do not have a controller yet. it's a 4x2x5, so 40 cu. ft. i found CO2 and YOU so i'm guessing i need .06 cu ft of co2 injected, but i have no idea how much that is. ive got a 20-30lb tank with a decent regulator. my questions are, how much psi should i run during injection and how long should it run for? how often?

also, i just poked my head in because i noticed my meter was at 88% humidity after i turned off my exhaust fan for the co2. guess ill need to have it running at some point every few hours to suck all the humidity out.

 

[elamigoverde]

I would have it very low. I use 15 psi for airbrushing. YOu can start there maybe and adjust to your liking

 

[steppedinds]

awesome. that's about where i've been running it for ~1min every 2-3 hours. got the exhaust fan setup to turn on/off right before co2 sprays. is a minute long enough/too long to spray? they are responding really well so far. i've got a bubble counter but i dont have any extra liquid...need to order some more