Help identify tank

[Nanogoof]

Hi I just bought a used tank that I thought was a nano cube 12 gallon. But the sump back section has four Chambers but I cut out one of them making it three. And I bought a intank media basket but doesn't fit. And the dimensions are completely different from what jbj says it is. So maybe I would try to see if someone can identify it for me. Maybe it's a older version or different model. Please help

[Aurortpa]

I am not sure!  But I think biocubes used to or use cobalts as stock pumps--I could be wrong tho.