Hey all, I was just wondering, how do you know if there is enough air circulation. I'm using a 64 QT tub, and I have 18 - 20 holes drilled in it, theres no problem with the snake, it just seems that when I open the cage, it smells funny... I know thats not very discriptive, but I cant think of a better way to describe it. It doesn't stink or smell stagnant, nor does it smell like plastic. It just smells like an animal lives there. I was just curious, is that a sign that there isnt enough air flow?