Though most driftwood will remain submerged underwater; some driftwood remains slightly buoyant until it is fully saturated and “waterlogged.” Soak the driftwood in a large bucket as long as possible making sure the entire piece is completely underwater. A minimum period of 1 to 2 weeks is recommended to allow total saturation.

Soaking also allows excess tannins that can darken and discolor the water, to leach out. The discoloration caused by the tannins will not harm your aquarium inhabitants but it will lower the pH slightly over time. Some hobbyists take advantage of this feature and utilize the tannins to achieve soft water conditions preferred by many tropical fish.