Well I may have a reason to dust off my old ppm monitor/controller... the fucking thing costs 700$ lol it did pay for itself pretty quickly though,,, I do miss supplemented co2. I have sooooooooo much going on but ultimately I want to start brewing in the same building the grow is in,,, Iv been wanting to make my own beer for a while. I do think a bag or two will be beneficial, dont need 1500 ppm, 700 is better than 400 (400 ppm co2 is average outside air)
I'll admit for a while I was bent on no co2 at night,,, but in the early stages of life on earth plants were the rulers of the planet,, and the higher concentration of co2 surly didnt disappear at night, every night. Supplemental co2 in indoor growing its not needed at night but I dont think a bag releasing it at night is going to hurt anything.
I never even considered the bags, I may give them a go next round! thanks sincerely.
And in the process I'll probably learn how to make my own
like you said.