Fabricating steel stand - which steel do I buy?

[jorjef]

I have a 120 sitting on 1.5x1.5x .125w its a very simple design, basically two 4x2 frames one under the tank and one as a base on the floor with the obvious four legs one in each corner. No cross braces or other reinforcement. No deflection that I can see.

[spit.fire]

to bad you're not in bc, i have a stand for that size tank sitting in my garage