Mopani Wood is the perfect addition to every freshwater aquarium! Sustainably sourced, this wood is taken from the roots of already dead trees in Africa. Since the wood is 100% natural, no two pieces are exactly the same. This wood features two distinct colors which help to add visual appeal to each piece. Perfect for aquarium use, Mopani sinks immediately and, unlike driftwood, will not rot over time. *All natural wood products leach tannins, which discolor water and reduce pH levels. To minimize this effect, soak wood in a separate container, and change water daily to remove excess tannins. When the water color goes from dark brown to a very light tea color (or clear), the wood is ready for your aquarium. Adding extra carbon to your aquarium filter can help remove any remaining discoloration.