When it comes to the amount of time you should boil driftwood, there is no single right answer and it will depend on individual pieces. Manufacturers usually specify the recommended boiling time for their products. In general, smaller pieces of driftwood that are up to 1 foot long may require 15-30 minutes of boiling, whereas larger pieces may need boiling for 2-4 hours. The longer you boil driftwood, the more tannins you will remove, so it will also depend on the type of fish you have.