I wish I had a way to boil it, but it was just too big. After a couple of weeks of pickling in salt with water changes, and then soaking it in fresh water to rinse it, I put it in my tank. Within a few days I had an algae bloom that just wouldn't quit. After 50%, 95%, and 98% water changes and filter media changes, I'm limping along with water that's still slowly getting cloudy. Maybe I'll try fake driftwood next time.