Originally Posted by Paul1792
Carbon doesn't do much except make money for people who sell it. It also only lasts about a month. Many people use floss in lieu of carbon since the "sponge" is too coarse to polish the water for crystal clarity. If you have room, stick in some Seachem Purigen. People on here love it and over the long run it does more and is cheaper to use than carbon.
+1. That's sound advice. Purigen polishes the water and removes nitrogenous waste. I would run the sponge, your biological media, purigen, and filter floss.