Hey Grim:
I currently have a 48 inch X 24 inch X 18 inch set up with Metal Halides over it. I have for 15 years been using magnum exterior filtration systems and I am trying to evolve. I have just bought, but not installed a new 72" 125 gal tank and the shop owner where I always go suggested t5 lighting. Is this sufficient for a tank of that height and size? I had seen other message boards on other sites ( I know, shame on me!) that suggested that T5 was not appropriate for 24 inch deep tanks. What sort of set up should I go with, knowing that I am starting from scratch.
BTW, I am using sump, protein skimmer, etc, in the new tank. No more old school, I just need to learn how to care for the new stuff!
