Yes man! There definitely IS hope!

Man, if there's no way of getting fresh air in there, I know there's a "CO2 bucket" that generates CO2.

It will not work to have a perfectly controlled, measure-ppm grow room, but I'm positive it'll help you pump some CO2 into that room.

If I remember correctly, it lasts about 3 months...

Let me do a search to see if I find it:::
Sorry man... didn't find it.

I'll try again in the future. Man, it was this bucket, that you put in your grow room, and it generated CO2 24/7. Wasn't that expensive.

But I don't know... I wouldn't want you to go all crazy with the "fresh air" idea, only to have it turn out that I was wrong and that wasn't your problem.

But keep at it man... keep at it!