Being that its a corner tank you should be fine with just the single metal halide. It's a 250w which is a good wattage towork with. How deep is your tank? From top to bottom? Just wanna make sure that there will be enough penetration, some tanks are narrow and WAY WAY deep...
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.