My first vivarium questions

[grantlapaz]

The man who helped me out with getting my first setup reccomended these two beddings.



After I got home I realized that these two probably weren't enough for a 40 gal. He really knew what he was talking about when he gave me all the options, but am I missing something?

It really doesn't seem like these two will be enough for my tank, so just wanted to check here before I try it. Thanks for reading

EDIT: Wanted to add on that the snake I am going to have is a young ball python.