It’s natural driftwood,without treatment. Before put it into fish tank ,you should do the following treatment:
1)Wash and clean the driftwood with brush;
2)Boil it in hot water for about 1-2 hours ,to release the tannin, until the water color do not change ;Repeat the steps if needed;
3)Soak it into normal temperature water , for about 7 days ;
4)Take it out and wash the driftwood