making a steel aquaruim stand

[mtar]

I'm looking at welding a two shelf aquaruim stand. with a 135 gal on top. A 45 gal and 10 gal on the lower shelf. The stand would be 3 ft tall. basically the footprint of the 135 gallon tank. It will weigh over 2000lbs. What kind of steel and thickness do I use. angle iron??? square tubing???


thanks, Eric