Funny story. A while back when I ran the G3 I ran carbon atop my skimmer for air treatment and in my sump baffles for water treatment before it reentered the tank. Well, when I was moving my sump around to make way for my H&S in the stand I broke the sump! I improvised and had an old tidepool laying around I just ripped all the crap out of it and used the plastic container i was left with as a sump. Not even remembering I used to run carbon in the water and having no baffles to put carbon in, I completely forgot. You JUST reminded me that I havent run carbon on my tank in about 6 months! Holy crap!!!! And to be honest, my system has never looked better in the past 6 months. So to answer your question, no I do not run carbon. However! I run my ozone at 10mg. I have found at any more than 15mg I can smell ozone coming from the top of my skimmer meaning some is escaping into the air. With under 10mg I get no ozone smell and it seems to be doing just fine for my system. It polishes the water nicely and my skimmer skims like a champ!
I didn't want to mess with my overflow piping but wanted to feed my skimmer 100% overflow. I bought a $1 plastic pitcher and placed it in my sump, directed my overflow into the pitcher and placed my feed pump in it. The extra overflow simply flows over the top of the pitcher and into my sump while my skimmer gets 100% overflow feed. That way I don't have to try an adjust the amount of feed I send through the skimmer. It also lets you see what direct feed will do for your skimmer before you make overflow piping changes.
