Sorry about the late response but I have just seen your message. The co2 is something I’ve never used to be honest. The canopy temperature is within the range that you have said it is probably been a bit less more of a 80/84 ish less now they are in their eighth week and the lights are on 80% room temperature is a 78 degrees light on and off it’s 72 is a bit more of a drop than i want but the plants are growing fine. The humidity is between 50/60 in my 4x4ft and the 2x4ft is more of the 60/70 slightly lower temperature is probably the fact the 2x4ft has not got any heating in the garden but the plants are growing and looking healthy The Fox tailing has been better since it has been growing in the level of light i think it is anyway. When you look at your plants all the time you will sometimes get a little i don’t know how to put it really complacent i don’t think is the right word for it. Sometimes you need another pair of eyes

or more to give you another opinion on the plants. I’m a good listener and I think i can work out what to listen to and what not to. (Hopefully lol

) Has been something that I have had to a few different plants in the past and it is like you said it is something natural for some strains that they will foxtail the lowest bud is the same way special kush was one like that. The only thing that is a concern for the co2 bags your taking about is the tent isn’t that sealed and the co2 might not be staying in the garden for long enough to be any use i don’t know? If it’s going to be a help with the garden and the plants are benefiting from it. I will try it for sure. Is it something you do ? Anyway thanks for your help and I’ll hopefully be talking with you soon peace