I drilled holes on the sides. Used aspen for bedding. Removed water bowl 2x a week on bowl cleaning days. Turn a fan on, open the door (supervised) and air out for 15 min a day. I kept my king in the T8 and my bp in a tub but I am using aspen as well in my tubs due to its ability to keep humidity up at all times. If you need to up the humidity for shedding purposes, add a humid hide.