From John Reese's Income Blog:
there’s a guy here right now in my house cleaning my 1,000 gallon saltwater aquarium. I already knew it was big (I designed it and had it custom-built) but seeing it being cleaned today really reminded me how freakin’ big it actually is…
Link - via eBaum's World
And if you think that's big, check out Arapaimag's Monster Home Aquarium. His is a 50,000 gallon behemoth!