Well I haven't been on here in a while but I'm getting ready to set up a 180g dual overflow tank. (big upgrade from my 55g) Anyway I'm not sure of what kind of equipment to get as far as lights (MH of course but how many 2 or 3 and how many watts 250 or 400 and 10k, 12k, or 20k), skimmer, pumps and power heads. Any suggestions would be greatly appreciated.