Land hermit crabs.

Question
Is Plaster of Paris, hardened, safe for hermit crabs?

Answer
Dear Megan,
thank you for your question.
It's safe for them, but I think that the constant humidity in the crabitat would soften it again and it would fall apart. You can ry to varnish it with epoxy resin to make it absolutely waterproof, that way the crabs also cannot nibble the plaster.
I hope I was of some help to you
Jennifer