Love the natural cave! Not all driftwood turns your water a different color. I would boil it, then soak it in a bucket for at least 48 hours. If it turns the bucket water a different color, then soak it longer. Otherwise, it won't turn your water colors.
I've got some curing in the trough outside now as well as some that has finished in most of my tanks. I'll take some photos tomorrow when I have better light.
