CO2 with no ventilation in or out

Has anyone got any opinions on this

I have 65 white rhino up in my attic. There is no where to vent in or out, so i decided to use CO2, I also have a 6" carbon filter venting strait back in the room. Has anyone tried this before or any opinions wellcome

my opinion is blast it with CO2 during the dark cycles. And that you wouldn't want to vent out the co2 anyways.

you should have all this figured out already if ya are growing 65!!!! plants, the hell you growin that many for anyways 10-year-supply of pot?

Way not. I'm bored!! And skint!!

What your attempting to do or will do is a closed grow room environment where you dont have to vent in our out but simply just recirculate the air thru a charcoal carbon filter. Many big growers & commercial growers do this type of method.

Since your not exhausting air simply get one of the CAP CO2 monitors that will keep your CO2 set at 1200 or 1500 ppm. Only use CO2 during your light cycle. Since your not exhausting your CO2 cylinder or generator will have to work less when using the CAP monitor. They are fairly expensive though. From the $300-$400 range. However, Sentinel makes some pretty affordable CO2 monitors that a way cheaper than CAP.

CO2 will only make up for a certain amount of high temp. Part of the reason for air exchange is to control temps. It seems to me that an unventilated attic would be prone to temp problems. Even with CO2 you can't get it to grow if it's too hot (or cold).

Remember to make sure you have some type of way to cool the grow room. That might be your only problem in the attic.