I am getting into this thread late and wanted to make sure I understood the dimensions of this tank. By the way I didn't know that these ADA franchises sold anything besides ADA. So I found it interesting that the Los in Frisco sell a "beginner" tank like the DoAqua.
So anyway, this DoAqua of yours is 31 cm in length? does it have the same dimensions as the ADA Cube Garden Mini S? If so that would be about a 5 gallon tank, yes?