As someone that had a really nice, simple and successful tank ten years ago, that had MH lights, live rock, skimmer, etc, and then has spent the last ten years doing Zeovit, Biopellets, and Carbon Dosing, and having some serious ups and downs, and mini-crashes, my vote is no "system". Water changes, good rock, good lights/flow, good skimmer, and tweak as needed. Obviously, MANY people are successful with Triton and AF, so in no way knocking any of them, but personally, I'm enjoying finally having some success again by sticking with the basics (hope I didn't just jinx myself ). Take this with a grain of salt, but maybe it's food for thought. Good luck with whatever you choose!