I keep Kingsnakes, Hognose, cornsnakes, and ball pythons in the same rack and have never had a problem. The cages of kings hognose and cornsnakes are generally kept cooler than ball python cagesActually, I run no heat in the top two levels of my rack.....which keeps good kingsnake temps from the heat rising from below. Invest in a temp gun for $25 and it is easy to figure out how your temperatures are working. If you can't get the temperatures right by just removing a level of heating....a dimmer on some heating or a seperate t-stat should do the trick.