I disagree, I find that carbon isn't very useful. I do have planted tanks though, but carbon if left to long in your tank can lead to hole in the head. Plus you have to buy new filter media every month, but if you cut the filter floss and empty the carbon you can reuse the media for wayyyyy longer. I'm all for recycling though.
As for carbon being useful for removing waste from your tanks, its nothing compared to what a few live plants and a good 25-30% water change every week can do.
IMO ditch the carbon and go for some live plants.