Well, I was pretty impressed by that South African tank. Lots of great coral, plus a lot of fish, which is not really seen that much. But at 15% water changes weekly, it unfortunately says little about the ATS. Agree that I have never seen an "awesome" pure SPS+ATS tank + no carbon/big water change. And while not really proof of anything, after thinking more, it is very disturbing. The fact is that ATS systems are rare, and the more modern intense waterfall type are even more rare. But if someone goes to the effort of an ATS, and they succeed, they are usually proud of it, and show it. Plus, a fair number of people are actively looking for success stories. I would have expected more. ---- On another annoying note - I think a lot of the arguments for/against ATS get really confused by the different generations. The old actual "Turf" horizontal dump bucket types are very different from the new vertical waterfall high intensity "Hair" types. It is not just a factor of efficiency. The algae types differ, cleaning differs, and growth rate differs. As can be seen by that table a few posts ago, algae type makes a big difference. Cleaning style and frequency has a large effect on how much scrubber algae ends up in the main tank. Even the efficiency matters, as it competes with algae in the main tank. So, a lot of the old-experience, good or bad, is not really worth that much.