They are already started in the 3's, and I AM going to listen to you and go even bigger pots next time. I have six stabs at it per year..... It is costing me under 300 per pound for electricity and nutes, including electricity to power the rest of my place. It ain't so bad for a guy who smokes a lot and doesn't sell...

even if you just do it under one light greenmed I think you'll see a noticable difference. Just make sure they are transplanted at least 10-14 days before flipping to make sure they are well established and your ladies will love it pimpin

The biggest single improvement a grower can do to there grow is add Co2.

Peace...Buddha

I do not think I could run CO2 in my current room without having heat issues. Even using cool tubes, I need to keep my exhaust fans running the whole time my lights are on.

I don't see your point here? Co2 allows you to run more efficiently at higher temps(into mid 80's). Adding Co2 will always be of some benefit... it allows the plant to run at a higher metabolic rate. Be careful though, when the plants metabolism increases so does their nutrient requirements!

note: you don't have to use Co2 burners. You can opt for a 20Lb tank and reg system.

Peace, E1

Keep in mind, those mid 80 temps are more prone to pests compared to the 70-75 standard. Multiple species of mites, specifically, thrive at 80-85F.

But don't let that turn you off from C02 - If you can pull it off do it!

My point is:
If I turned my exhaust fan off, which you need to do to use the co2, the temperature in my room would instantly skyrocket to well over 90 degrees from the heat from my 4000 watts. That is why I could not use co2 in my current room.

If your fans aren't running when the lights are off,couldn't you supplement with CO2 then?

I agree, the Co2 can be added during dark period, if you are worried about smell, just shut the fans off for a couple of hours and then have them come back on.

Don't use co2 when lights are off. It would be a waste