Please kindly be noted that:

In order to ensure better sinking effects of the driftwood, the driftwood had better be pretreated before being put into water.

1: It is recommended to boil it for a long time.Boil or soak it for 3-4 hours. It is recommended to add soda or salt in water and you must boil it for at least 1 hour. The color will get darkened as it will release tannins.

2: Change the water and boil again (recommended 3 times, 1 hour each time) until the tannins get completely released.