Some of us Kraft/Butcher Paper in PVC enclosures. Its easy to clean and cheap. I never have to worry about mold, bacteria etc.. However if its a Glass Tank with a screen it will be hard to keep humidity period so most people with tanks use kinds of wood mulch substrate. If you still want to use Paper with a glass tank you'll have to cover the screened lid and use Moss in a hide for humidity so your snake sheds properly.
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