Help with frame for tank

[afcbob]

Am away to build a big fish tank in to my wall 6 x 2 x 2ft 12mm think glass ways about half ton fill i think. i need help noing how best to do this is size of wood? i was think 4x2"
I also would like to no what joints to use for this. am on a 1st floor flat so need the load spared over the floor
Any help would be great.

Thanks

This will be the 1st of a few post on this project.