A fluid storage tank includes a plurality of end panels defining a plurality of curved wall sections and a plurality of side panels extending between and connecting the plurality of curved wall sections. The plurality of end panels and plurality of side panels define a perimeter wall. The fluid storage tank further includes a plurality of cable arms, each of the cable arms connected to a flange of at least one of the plurality of end panels or side panels, and at least one upper tension member having a first end connected to one of the plurality of cable arms and a second end connected to another of the plurality of cable arms.