Boiling is out of the question. The pieces of wood are pieces of wood I can lay from one side of the tank to the other and enter the upper water column to fill in the gigantic gaps I have in that part of the tank. I am however planning a trip to the mountains of North Carolina in a couple weeks and in the past, I have found interesting pieces of wood floating or laying in the Creeks, streams, rivers and lakes. I'm trying to hold out till I go up there and see if I can bring a nice piece back. What I usually find up there is birch Mountain Laurel and rhododendron