PINVNBY Natural Aquascape Mopani Driftwood adds an interesting and beautiful decorative element to aquariums and serves as an anchor for live plants. It creates a natural setting by tinting aquarium water. The Fluval Natural Aquascape Mopani Driftwood will serve as the perfect addition to your aquarium. Pretreatment: To ensure the driftwood have a better sinkable effect , you’d better pretreatment the driftwood before you put the driftwood into water: 1:Boiling in water for 1 to 2 hours with soda or salt ,the water color will become dark cause it releases tannins 2:Boiling the driftwood with water again ( recommended 3 times, 1 hours each time ) until the tannins totally releases Package included: 1pcs large driftwood (Sizes varies from 14 to 18 inches)