Abstract: A portable reservoir frame has a plurality of panels that form an enclosure when adjacent panels are connected. Each panel has a plurality apertures spaced at intervals along a first side edge and that extend through each panel between the exterior face and the interior face, and a plurality of male members spaced at intervals along a second side edge and protruding from the exterior face of the panel. Each male member is sized to extend through a corresponding aperture in the adjacent panel with the remote end protruding. There is one or more locking bar that has a plurality of receivers that, when installed, extends along the second side edge of the panel and simultaneously engages a plurality of male members. The receivers engage the peripheral engagement on the body of the male member and prevent the male member from being withdrawn from the aperture.