I bought a large piece of driftwood from the LFS for my father's tank. After soaking it for 24 hours, it still floats. We are now soaking it in the bathroom overnight, tonight. Could they have given me the wrong driftwood? This is attacked to a piece of slate on the bottom, and it still floats strongly. I first thought that it was treated, so it would sink, then I though 1 day of soaking would be enough...too bad...I have to leave before I can attach anubias and java moss to it...poor guy will have to do it himself. Should I have him return it if it doesn't sink by tommmorrow???