Thanks Stace, I'm kind of stuck on how to filter it too.
One idea I had was to run a canister filter with a small draw line running all the way down close to the bottom. And the return at the top.
I'm also considering running a small power head at the bottom, as well as a large amount of bubbles
I figure I would zip tie these three lines together, and use fake plants to camouflage the whole line.
But I have to fix it first. I think I will try to weld it from the outside like several of you have suggested.
With it being 5 ft tall it's very difficult to get the bottom and weld a new plate in on top, as good as an idea as that is it won't work for me.