Curing rock usually refers to letting bacteria that convert ammonia to nitrites and nitrites to nitrates grow, a process that takes about a month. What you want to do is be sure you do not move ich from the old tank to the new. The only way to do that is to sterilize the rock, I would use chlorine and boiling. This will kill the stuff on the rock. Unfortunately it will also kill the bacteria which you want. So it will be a 2 step process. Kill everything on the rock then stick it in the new aquarium and regrow the bacteria. As far as quick after you add the rock to the new tank an additive with live bacteria will cut the time down a bit but you still need to monitor ammonia, nitrites, and nitrates to be sure the bacteria to handle them have time to grow.
