Yeah, good point danm.
King, if you're planning on dismantling the nano when the big tank arrives, why not just leave it and keep the clown feeling safe and secure for the time being? :wink:
Afterwards, if you REALLY want to use the rock, you can blast away at it with kalk or vinegar without much for worries.
If it were me, I'd try to talk my LFS into working with me on finding a pep. shrimp that likes the stuff and once it's cleaned up, leave it in place and develop it further. (Unless you have no room for a 13g nano after the 120 arrives....)