Sand boa questions.

[MarkS]

I just picked up this pair of Sand boa's recently and I was wondering if anyone had any recommendations for a good substrate that they can tunnel through.

[Evildrdee]

Have mine on walnut shell sand. I don't feed him on it though, I feed him in a tub so he doesn't get impacted. Put them in what you want. Just don't feed on sandy materials

[MarkS]

They're on plain play sand now but it's so heavy. How light is the Walnut shell?