I added driftwood to a tank, and thought that I'd not like the look of the water-
believe me, you won't notice a difference unless the lights are off. When the lights are on, you couldn't tell the difference.
I put a substantial hunk of brand new driftwood in, but it hasn't had an adverse effect on my water clarity. I do biweekly changes, and seriously, the tint is only noticable when the lights are off.