What was once a blessing is now a curse. My beautiful xenia is overrunning my 12g NC and I need to take some out. I'm planning on just taking it to the LFS for store credit since this is my only tank, but I don't know how to get it off of the rock.
Taking the rock in, is not an option - it's going to stay in my tank.

My dad uses common BBQ tongs (clean, of course) to grab onto the xenia as close to the base as possible, and slowly peels the xenia off of the rock. I tried this to no avail - the guy at the LFS said to use a razor blade, but that obviously won't make a clean cut so it'll grow right back.
Suggestions?