No, I believe the point that Gus is trying to get across is that he can keep his tank running without a skimmer, filter, additives, etc. And apparently succesfully. Is this a fish only set up Gus or do you keep corals? What size tank, whats your lighting, sand? Live rock?
The tanks you see now Gus (as you put it - that look like someone has tipped a tin of fruit salad into it), are simply tanks full of corals and marine life. With the proper husbandry and meticulous care as far as coral placement goes, along with regular fragging of those corals, it's quite easy to keep a tank growing and thriving. As long as the optimum conditions are given to the animals you've chosen to place in your tank is met, then the tank will thrive. We just try to simulate the same effects that nature has on a coral reef in our little boxes of water. Marine animals, currents, storms, humans and many other factors have an impact on the reefs and how they grow. We just try to contain a small piece of the ocean in a box. Certainly, if a tank full of corals is left without care and maintenence, it will eventaully fail. All we're trying to do is stop that from happeneing by keeping up with a regulalr maintenence schedule and providing the animals the nutrients, water quality and lighting they need.
I must say, if you can maintain a tank without any form of maintence, then bully for you. 8) I would LOVE to see some pictures of your current set up.