I've kept tanks for about 14 years. I've had reef tanks for about five years with my current tank being about 1.5 years old. It was moved to it's current location in July '06. I still don't know squat.
Current Tank Description
180 g tank w/ 3 250W 10K metal halides & 3 30w vho actinic. ~300 pounds mixed live rock. SPS dominated. 1/2 hp chiller, K2R calcium rector, GEO nilsen reactor, enaly ozonizer w/ milwakee orp controller, dual injector MR-2 w/ pan world