Hey I got a couple questions for ya, are you bringing air into your room from outside? If the rooms 85 F and lets say the air outside is 40 F, is it alrite to be bringing that cold of air into the room with it being that warm? just for 5 mins every 3-4 hours of so. And for your Co2 setup are you using a controller or how you planning on running it? and when should you put your screen down? a few of my plants are 1' tall FIM, topped, and I'm LSTing them, I put some paper kind of tape just a lil above the middle of them and used fishing line to bend them over and tie it off to get all the bottom flowering sites more light til the rest of my plants are about 1' tall and start showing more flowering sites cause yesterday I just topped and FIMed all of them, I was thinking in about a week I might lay the screen down 8" above the pots and start training them til they fill out the screen, does that sound bout right to ya? sorry about all the questions I've just been really kind of confused how to run my ventilation in conjuction with the Co2 since I don't have a controller and just wondering if I'm doing the right thing by laying the screen down in about a week.