I think this is still on the topic...
I have live rock in my tank and a canister filter. The live rock is in a loose formation and about 1/2, maybe a little more, of the space in the tank is live rock (read about those two items in the articles). I'm understanding that I don't need the bio-media in the canister filter, but what I meant was, I use filter floss, to filter out particulate matter, and carbon, for whatever it does, in the canister filter as well. I have a protein skimmer and two powerheads for flow (plus the one with the skimmer). Are you all telling me that I can just get rid of my canister filter if I want? I don't really see particulate matter, but I'm a previous freshwater aquarist, so I just assumed that a filter was necessary.
Also, I have my 15-gallon Eclipse system with it's little filter pad that has carbon inside, but the guy who gave it to me was also running a flubal 104 with carbon, filter floss and bio-balls , so I just kept it set up that way. Could I nix the fluval canister and just use the setup that came with the Eclipse tank for my filtration? In that tank, I don't have much live rock, but I have a gramma, two very small clowns, a dragonet and a six-line wrasse, no inverts. (7.5 inches of fish recommeded by saltwater aquariums for dummies).