Carbon - Yes or No?

[sphelps]

I've never run carbon religiously, once in a while sure but it's not required, my tanks have always done just fine without it.

I think some tanks will benefit more from it, like really mixed reefs that have lots of soft corals and SPS or tanks with high bio-loads, agressive feeding or undersized skimmers. Also if you're really anal about ULN then it might help you sleep better.