Forgot to update this... oops. Life has been crazy.
I put in the substrate a few days ago, will post pics soon. Ultratherm should come tomorrow, so then the crabbies can go in their new (albeit unfinished) home.
Pluto is digging everywhere in the 10 gallon and I'm sure he can't wait for even deeper sub and more room to tunnel. Apollo is more of a climber and as soon as possible I'm going to work on the second level for him. But little Pluto was being so cute earlier, he built a little cave up agaisnt the glass and was watching me study for a test.

I kept getting distracted by how adorable he was and my poor history book must have felt very neglected until Pluto pushed dirt up against the glass ad I couldn't see him anymore.
