Just to clarify - you are still filtering your tank when using live rock and skimmer. Live rock provides a place for beneficial bacteria to colonize, same as a sponge, ceramic media, etc. in a canister filter (or hang-on-back filter, etc.). Generally canister filters are not maintained frequently enough which can cause nutrient spikes, which is why most people do not run them on a reef. A protein skimmer is also another type of filter... it removes dissolved organic waste from the water column before they have a chance to break down, which is why they're favored in reef aquariums.
Make sure you do your research on skimmers, GFO and other media before jumping into anything...
Make sure you do your research on skimmers, GFO and other media before jumping into anything...



