Probably the most provocative article in a long while...

[Delphinus]

Hmmm, interesting. Without reading the article as yet (I'll try to read it later if I can), for me though, I guess it comes down to this: My skimmer produces dark nasty smelly goop water. I assume it's fish poo that makes it like this. If I didn't have the skimmer, that goop would stay in the tank. Whether it's DOC or TOC or ABC doesn't really matter to me very much, what matter is that it smells bad and I think my tank is better off having it taken out than left in.