I apparently inherited sump-one's unfinished project: - Capital Cichlid Association Forums

I apparently inherited sump-one's unfinished project: - Capital Cichlid Association Forums: "It sounds like what needs to be done is for a three sided box to be glued over the "notch," with dimensions about 2-3" larger than the notch in all directions.



 At the bottom of the box, you would put in some bulkheads, which would run into a sump filter, as well as allowing your returns to pass through. This is done with some custom tanks because the overflow style is rather quiet. In theory, you could also extend the height, put bio-balls and media in it, and skip the sump, but ... I'd worry about the weight. "



'via Blog this'

There you have it, a 150 Gallon Tank (FREE!) but the trim was removed and this 2 inch deep cut on one of the edges is about 22 inches long!