Quote Originally Posted by Bonnie loves Clyde View Post
Well I just bought it from the pet store and it said it was heat treated already
Heat treating only kills the mold that is already present. If new spires come in contact with the wood more will grow. If its white mold then it is very common on driftwood and usually doesn't spread too much, but can grow in an hour or two. You may want to remove the wood place it in some boiling water then soak it in de-chlorinated water before replacing it in the enclosure. I've never treated any of my driftwood with bleach. I just scauld mine.