hey, will you let me know how your mopani is doing? I got a piece a few days ago and its still tanning the water that im soaking it in.
it sucks because i really want to add it to my tank.
EDIT:
dont boil rocks, hot water is fine. Just make sure that you test your pH and water levels for a few days after adding, if anything drastic (pH swings, other strange happenings) happens then you will need to remove it.