The other day my brother in law told me that his wife thought it was awful to put snakes in a rack in tubs, he thought they should be in open tanks. I told him how every mean snake I got was in an open tank and immediately mellowed out in a tub. I think it's a non-snake persons desire to house an animal from a human perspective so that they are free to look out and observe the room and environment around them. However, I'm convinced it's like taking an earthworm out of the ground and putting it in a fish bowl, just not the right environment for the animal. So basically if you put a snake in an open tank the hide becomes his 'tub', and most hides in open tanks are not nearly as roomy as a tub in a rack, so if the snake feels the need to explore they only option is out of the hide and into the open instead of crawling around in a bigger tub in a rack. Just my opinion...