alot of people like to use newspaper or paper towels cuz its quick and easy and very cheap especially when you have alot of snakes. but i use aspen and i like it alot. it looks good and it absorbs the smell of the snake poop but if it gets wet it will grow mold eventually so you have to kinda keep an eye on it but its pretty cheap too
I use Eco-earth expandable substrate as it is easy to clean and holds smell very well. It is also very resistant to mold and holds humidity extremely well.
Ball Pythons:
0.1.0 Bumble Bee- Schnapps
0.1.0 Pinstripe- Penny
0.1.0 Super Cinnamon- Cleo
0.1.0 Albino- Daiquiri
0.1.0 Low White Piebald- Hershey
1.0.0 Low White Piebald- Reese
1.0.0 Paradox Super Cinnamon- Dash
1.0.0 100% Het. Albino- Jester
1.0.0 50% Het. Albino Jake