My tank has been running for 5 years. It started with a 38 high, then a 75, now a 120gal all-glass dual overflow. I am using an outer orbit extreme light system (2x150watt 14k hqi's & 2x130watt 460nm actinic pc's) The hqi's are on for about 12 hours, the 130w pc's are on for 13 hours and the pc on the sump is on 8 hours. I have four aquaclear power heads and a magdrive 5 returning water from my sump. My sump is a 30 gallon long tank devided into three sections by plastic "egg crate"...the largest center part has chaeto growing in it on a reverse daylight system, powered by a 65 watt 50/50 pc bulb. There is a coralife needle wheel skimmer at one end of the sump and the magdrive at the other. I also use a 300 watt titanium tube heater with an external control and probe. No chillers required since I cool the whole room with an air conditioner when the temp. goes above 78deg. in the room. I use r/o dionized water, reef crystals salt, 2 part b-ionic supplement, and purple-up coraline algea supplement. I feed my fish once/day with a mixture of mysis, mega-marine algae, frozen cyclopeze, sinularia enhanced brine shrimp and prawn eggs. I keep my spef. gravity at 1.025, ca 400-450, alk 3.5, ph 8.1 - 8.3, phos and nitrate as low as possible and temp at 78 deg.