I've only been doing salt water fish for about 6 mos. I converted my 25g freshwater tank that I had running for about three years. I hope this doesn't get me banned from this board, but I run my salt tank same as I ran it when it was freshwater. I have a Penguin BioWheel for filtration, about 1" of crushed coral on the floor, one power head, and the standard light fixture (I did swap the bulb for a 50/50.
There is not much load on the system, I have two clowns, a purple psuedo, a striped damsel, chocolate chip star, a condi, two snails, and two small hermits. I had an urchin but it died, probably because I use tap water for changes. (Am looking at RO filter.) All the fish (except the urchin (I loved that critter) are doing fine, have been for about 6 mos.
Like I said I hope this doesn't get me booted, I know I am doing just about everything wrong, but it works and you asked.