Well, I had the day off and after being in my new place for a couple months now and a couple months of wife nagging me, I finally got an easy shelf built for my 40 breeder tank. I didn't want a shelf permanently mounted to the wall incase I decide to rearrange and repairing mobile home walls is a huge pain. So, in a nutshell here is what I did.
First a pic of the setup before.
A pic of the supplies: 2 four foot drilled angle iron, two shelf brackets, and a couple bolts I had laying around and a shelf board.
Parts spray painted to match the metal stand, flat black.