I am currently in the process of ordering a aquarium measuring 120x72x30, and i am curious to hear some opinions on best ways to filter it. I have contacted several aquarium builders and have received many different options on filtering. some recommend using fluidized sand filters, where others say use traditional sump design, then a few recommend using all natural filtration with a refugium. All three designs obviously incorporate a large protein skimmer. the aquarium will house two brown banded bamboo sharks and hopefully if there is enough room a male grey smoothhound, and maybe a few naso tangs. So any opinions on sump design would be really appreciated. also what would be the best location for the overflows, corner, center of tanks, back of tank. The volume will be roughly 1100 gallons, not including sump. The last question i have is will a metal stand affect the sharks?