Abstract: A collapsible utility cart for holding working materials, such as a five-gallon drywall mud bucket and related drywall tools, is disclosed. The utility cart is expandable from a collapsed configuration to an extended configuration. A base has a plurality of legs that extend downwardly therefrom, each including a rolling means. A plurality of nestable, generally planer shelves each have a central aperture therein and a retaining lip extending upwardly therefrom at least partially around a perimeter thereof. A bucket holder is adapted to hold the five-gallon bucket and has a peripheral wall extending upwardly around a perimeter thereof. A plurality of support poles each have the interlocking means at each end thereof. A handle is included and adapted to interlock with the interlocking means of the top-most support pole, such that the utility cart may be carried thereby, whether the utility cart is in the extended configuration or the collapsed configuration.

Abstract: An aquarium system for containing water and aquatic life therein is disclosed that includes a reservoir and an aquarium that is mounted generally above the reservoir. The aquarium has an outlet in liquid communication with the reservoir through an outlet conduit that includes a discharge mechanism, preferably an inverted U-shaped siphon conduit, that periodically discharges a portion of the water from the aquarium to the reservoir therethrough once the water has reached a maximum water level. A pumping mechanism pumps water from the reservoir up to the aquarium through an inlet conduit that is in fluid communication with the reservoir and an inlet of the aquarium. As such, when the water reaches the maximum level in the aquarium, the siphon conduit substantially fills with water which begins to flow out through the outlet conduit, drawing a portion of water from the aquarium rapidly through the outlet conduit until the water in the aquarium reaches the open bottom end of the siphon conduit.