My husband has a substrate mix cuz we were having humidity problems. But he is in a 20g tank with coconut fiber on the bottom, a layer of aspen on the top, and very little sphagum moss sprinkled. He has 2 hides (one is a humid hide) 2 water bowls, and the back and sides of the tank are lined (from the outside) with black contact paper. We have an accurite digital thermo/hydro readin arund 80 cool sideand 90 warm with a range of 50-60 humidity. We also have an anolog hydrometer (60-70) and thermometer(83-88) mid tank. I'll take some pics of him. I thought about just putting a hopper in his tank but I really don't wanna do that, all our snakes feed in a seperate bin and I don't wanna risk changing that.