An assembly includes a plurality of uniquely shaped modular members provided with at least one linear slot formed therein and a body provided with a uniform thickness. Selected ones of the modular members have monolithically formed tab portions extending outwardly therefrom and are removably interfitted with the slots. A reservoir is provided with detachably conjoined upper and lower regions directly conjoined to each other wherein the upper region defines a cavity for housing water and aquatic creatures. The lower region is directly engageable with selected ones of the modular members so that the reservoir can be maintained at a substantially stable and elevated position above a ground surface. The reservoir includes a mechanism for illuminating an outer perimeter of the lower region housed with the lower region and isolated from the upper region and a mechanism for removing undesirable debris from the water contained within the upper region.