Our naturally sinking driftwood is 100% tank ready when you receive it. There is no need to do anything to it but place it in your tank. If you need to remove your centerpiece for any reason, place it in a new plastic trash bag. DO NOT allow your centerpiece to dry out as it will no longer sink. DO NOT place your centerpiece in a bath tub or any other container that may have had soap or other chemicals in it. If you ever need to clean your centerpiece, use a 10-1 water/bleach solution and a soft bristle tooth brush to lightly scrub the piece, and thoroughly rinse with clean water when finished. We are currently only shipping waterlogged pieces in the U.S.