I have a year on mine. I love it. I have a 63 gallon cube and with the sump I have 70 gallons total. I've had the tank over a year, and am still on my first bucket of salt! That's how seldom I change water. Nitrates stay at zero. Floyd R Turbo has a great thread in the DIY section I believe. I have a 9" X9" scrubber lit on two sides. I have found that a CFL with a big reflector works best, but I have a 27W par 38 grow lamp on the other side due to space. My scrubber is in line with the drain and has about 500GPH flow.
I started with just the scrubber, but added a skimmer to eliminate a yellow tint in the water. It took about three months to really get going, but zero Nitrates since.