I would like to add a piece or 2 of natural driftwood to my tank. I live just a few miles from a large lake and was wondering if there is any reason why I couldn't go search there for some driftwood washed up on shore. I realize that I would need to soak and/or boil it for a while to prepare it for my tank. I just hate to spend money ordering driftwood when there seems to be such a nice free supply so close to home.