I picked a piece of oak wood on my backyard, soak it in water and use a knife to take the pak off. Then i sand it and cook it for few hours. I put it in ... toilet tank
so I dont have to mess up with it and you know, i "change" water few times a day !!!
I'll leave it there for about 2 weeks or so... I hope my fishes dont hate that "dirty" driffwood...