I decided to try combining everything!
I've got a good protein skimmer, a large amount of live rock, a sump, and filtration pads, a biowheel, and activated carbon all built into the sump. I'm not sure whether or not it's working or not.
I have never, EVER, had nitrates, but I have a constant, very low level of ammonia (0.25 ppm). Anyone have an idea?