please help co2 from tank with regulator

[tyler_ hobbyist]

I have a 90percent sealed room and im running co2 from a tank on a regulator hooked up2 a timer. Im way to cheap for a controller. How do I determine when to turn on my co2? Every 2hours every 4hours ect... any info will be appricated

[gbauto]

I'd say the only direct way to verify what works for you is a meter to monitor co2 ppm. Looks like at least $100 will get you there.

[tyler_ hobbyist]

Can u post a link of a meter? The only ones I can find are 400 and up lol and I cant afford that lol

[tyler_ hobbyist]

If I use 13cfh at 2mins that will give me my 1500ppm give or take but im worryed how often I have to turn my regulator on lol I bought a co2 test kit but there exspesive 30bucks for 2tests