Hello I don't mean to stir the pot on the carbon issue but I recently was referred to this article written by Dr. Tim Hovanec regarding carbon in filtration:
http

/www.drtimsaquatics.com/Article_db_folder/page41/page41.html
The article was written in 1993, however, after emailing Dr. Tim at his website a couple of weeks ago, he referred me back to this article, so I think I can safely assume his position has not changed on the subject. Here is a small sample of the article (full article link above) regarding his views on carbon:
"Activated carbon should be part of every aquarium filtration system. This is another statement that some have disagreed with me about. However, personal experience with using activated carbon for years along with data collected in my laboratories supports my claim. Carbon has been used continuously in all types of freshwater tanks, saltwater fish-only tanks, reef tanks and large display systems in the labs and never has there been a problem.
The reasons given for not using carbon or not using it continuously include: the carbon causes some diseases, it removes beneficial elements/substances for the water, and eventually the carbon will de-adsorb everything killing the tank inhabitants. None of these reasons have ever been supported by experiments or tests. Rather, they are myths. And as myths, they circulate through the hobby growing a life of their own which becomes hard to kill.
The reason to use carbon is that it removes dissolved organic compound from the water. This has been shown experimentally. Removing the dissolved organics will increase the effectiveness of the biological filter. Again published studies have demonstrated this. Plus, removing the dissolved organics will make the water look cleaner because it will be clearer."
Again, I really don't mean to stir the pot, I am new to all this myself, but found this article very interesting and scientifically sound. Just my thoughts
