Hello guys , i am trying to make an Asian River natural tank. I already planted it with some easy plants like vallenserias echorynus etc and used waterlife's fertalize.So i am wondering about some driftwood. How do i prepare my wood without losing tannins? I know that many people boil them but they prefer crystal water. I would like my water to be brown like muddy rivers in Kalimantran. Do you have any suggestion how to prepare the wood and not lose all the tannin?