I agree with the above, if you live in a high humidity area (or want to swop depending on seasonal humidity levels) and so can achieve the right humidity levels with Aspen it is fine.
I cant use Aspen because the background humidity is always low where I live and using that would just make it worse for my ball pythons.
I am using paper because most of mine are in quarantine. Even with a neutral substrate I need 2 bowls to achieve the humidity I need. I couldn't use Aspen as there is no more room for more bowls lol.
But i have bought Reptichip for once the quarantine is over. That should remove the need for two bowls for me.
Me too. Lots of experienced keepers here. I have learned a lot already, and still am learning