Bob, store-bought or not, you still need to boil the driftwood unless it's coming out of a tank pre-seasoned so to speak. Even then you should quarantine it.
FWIW, I picked up a small chunk of mopani a few months ago from my LFS for my 10g for $5. I brought it to a boil 5x and it still made tea water out of the tank for weeks.
FWIW, I picked up a small chunk of mopani a few months ago from my LFS for my 10g for $5. I brought it to a boil 5x and it still made tea water out of the tank for weeks.