I am currently in the process of setting up my first reef tank. It's a 120 gallon with dual overflows. I have a 55 gallon I am using as a sump below it. I am using two submersible pumps. A Mag 9.5 and an older 1200 gph Dolphin pump.
I have 2 400 Watt Metal Halides that I plan to mount in the...