So, I'm attempting my first paludarium (It's a 40L blue planet tank) and I have some questions about the background. I wanted to have a cork bark background but after searching I have come up short. Can't find it anywhere local.
I have bought some cork tiles. The packaging says they are natural and unsealed. Do these sound safe?

I've been racking my brain trying to come up with a way to make them look more natural and happened to look out my window and see my whole street is lined with paper bark trees. Can anyone think of a good reason why lining the cork tiles with the bark wouldn't work? Had anyone tried this?
Thanks.