what woods are safe for my millies?

[Hisserdude]

Wanted to let you know - I soaked 12 cups of OAK Traeger pellets and it expanded to 36 cups; so 300% expansion. I'll try some different types of wood and see if they expand the same. Thank you again for your quick answers. Means a lot to have help out there! (PS - I guess I'm going to need more millipedes with all this wood....)

Woah that's a lot lol, you are gonna need a lot more millipedes to help consume it all! No problem man, I'm happy to help! Hope your wood ferments nicely!