The directions I saw said to let the rock sit and air dry for 10 days, then add it to a 10/1 solution of water/bleach. Let it sit, I don't recall for how long though. Then put it all in fresh SW and let it sit there for a few days, do a 100% water change with fresh SW and let it sit, then do 1 more water change. From there I would re-cure it.