I'm Not really worried. It was sitting in the ocean water for ages on a shallow island.For safety of water condition and your fish, I always suggest letting drift wood soak in boiling water for a hour to clean and kill any bacteria it may have. (At the minimal) I also let it presoak in a separate bucket for about a week in case of any extra tannin and because smaller not water logged pieces tend to float.
Sorry ment to quote the guy asking about adding drift woodI'm Not really worried. It was sitting in the ocean water for ages on a shallow island.
Almost wish I had a salt water tank its got barnacles on it and I cought so many little salt fish there.