Jon - when I drained the 10g nano (which came with sand) for the 15g nano (which came with sand), I left the 10g sitting with 2" of tank water covering the sandbed. At the time I wasn't sure if I would need that sand or not.
It is still sitting in my basement under about 1" of water, at room temp. This is the sand I mention in the "tank cycling" thread nearby.
If you think it would be helpful, it can go home with you. Or is that "back home?"
Alan