How long have you had the driftwood in the tank? It may be leaching its tannins which would account for the colour in your water - (looks like any variation of a cup of tea without milk). Thats what I think it most probably is. If so the carbon will help, the purigen will most probably remove most of it but it can continue to leach for months. Fish will be happy, you won't like the look!
Unfortunately I can't look at your links, having exceeded my households bandwidth for the month :oops:, downloading fish pics I think :roll: I have increased my limit but it wont be available until after midnight tonight.