Sooooooooooo I am dumb, hahahahaha. I figured out what was causing the leaf curling, it was definitely the cO2. I was going through the process of elimination and that was just about the last thing it could be. SO I wanted to just try and see what the temps would be like without the heater running, low and behold because I now insulate it each night the lights are providing more than enough heat without the extra cO2. That is great news because now I feel confident that I can brave the coldest of cold with this setup and will start putting the rest of the babies in their forever homes tomorrow. Assuming I don't feel like death still. I am sick and it sucks, but the work still has to get done lol. I will update in the morning with pics