i just set up a 125 gal with 2 large pieces of MOPANI wood. I pre-soaked both for a week in buckets. My tank has been brown for the past 4 days, but it gets lighter daily. It went from almost a tea color to a slight yellow hue. i'm just trying to wait it out. I have a fx5 pumping at full force with charcoal in it. it's kind of good to know that others have experienced the same thing and that in due time, the tank will be crystal clear. thanks all!!!