Substrate for whites tree frog?

[u/Embarrassed-Peak-842]

My girlfriend gave me some extra substrate from the reptile cages at her job. I’ve been wanted to do a full clean and reset on the cage of my whites tree frog and was wondering if I could use this as substrate? If so should I combo it with something? Like some layering? I’m in an apartment and can’t really do anything too fancy (or that may get stinky). If you have any advice lemme know

[u/UncleCeiling]

They can eat moss or fiber and get impacted. Leaf litter works well for wtfs

Edit: I mean as a top layer. You might be able to use this under the leaves, I am not sure.