I was really surprised to start smelling the plants right away. I don't smell anything outside of the tent which is good I find I can keep temperature better if I don't run the exhaust fan all the time. I usually just turn it on for 10 mins a day. I also open the door many time a day just to check everything. I found a pretty cool solution for keeping humidity down, Eva-dry E-333 Renewable Wireless Mini Dehumidifer on amazon. Just put it in the tent, requires no power to run, when the balls inside change from orange to green you take it out and plug it into an outlet until the balls are orange again. I think im going to put a couple more in when I get to the bud stage.
I use botanicare products as well and I use 4 stage RO water. I started young plants on 3ml per gallon of cal mag and increase it to 5 max. Just finished my first grow too and that cal mag because of the 2.0.0 caused a nitrogen toxicity in late flower just an FYI. Good luck happy growing!