He’s on paper towel because I live in a very humid climate (Pacific Northwest) so I wanted a substrate that wouldn’t add to the already high humidity here. I considered aspen due to the fact that it naturally lowers humidity but I’ve seen quite a few people here on the forums and elsewhere not recommend aspen due to the risk of it getting inside the snake’s heat pits or impaction (I know the risk is really small but I got kind of paranoid about that). I also think I read that aspen molds easily? I could be wrong there I don’t remember.
I also keep my BP in a plastic tub that holds in humidity well itself, so if I added a substrate like coco husk I’m pretty sure my humidity would be in the high 80-90% at all times (my humidity is in the 65-78% range right now with paper towels).
The reason I didn’t opt for a glass tank is because glass isn’t known to hold heat in well, and they’re also more of a hassle to clean. So when I weighed all the pros and cons of the plastic tub and paper towel substrate, the pros outweighed the cons for me personally.
Another reason I chose paper towel was because I’ve watched multiple care guide videos that recommended everyone house their snakes on paper towel for the first 30 days after they get them in order to monitor their feces and see any mites more easily. So far I’ve only had my snake for a little over a month, so the first 30 days just passed and I haven’t noticed any mites or anything wrong with his feces, but I kind of just like how the paper towel is working out altogether.
However, I might consider switching him to a loose substrate further down the road once I do more research about the pros/cons of aspen. It’s just so far the paper towels allow me to have the perfect humidity for him. I’m also not worried about the enrichment factor of loose substrate because his tub has fake foliage and a big bridge thing he can climb through and over, but I’m totally open to upgrading his tub in the future if he needs it.