Abstract: A dual-purpose cap for a jar-aquarium comprising a topwall having (a) at least one ingress aperture sized to accept free unbroken water-stream passage therethrough for cap-on filling of the jar-aquarium and (b) at least one egress aperture smaller than the ingress aperture and spaced therefrom to facilitate controlled cap-on out-pouring of water, whereby jar-aquarium water may be changed without removing the cap. A series of egress apertures may be grouped together along the edge of the topwall.

Abstract: A knock-down type support stand especially suited for aquariums or other heavy objects employs double walled support legs that are each formed of inner and outer sleeves of tubing. Upper and a lower horizontal frames act as supports for the objects. Attached to each outside corner of both of the frames is a corresponding one of a plurality of vertical hollow sleeves, each of which is of the same cross sectional dimension as the outer hollow sleeves in the support legs. The inner sleeves for each of the support legs are inserted into the vertical hollow sleeves in the frames, while the outer hollow sleeves for the support legs engage the top ends of the vertical hollow sleeves on the lower frame and the bottom ends of the vertical hollow sleeves on the upper frame. The stand preferably uses tight, friction fit tolerances to increase sturdiness and can be easily assembled without any fasteners.

Abstract: A decorative submersible sculpture is described in which a submersible hollow body is formed with a peripheral wall structure. The wall structure defines an internal receptacle of a prescribed decorative shape that is configured to be substantially filled by a visually opaque particulate medium and formed by the internal receptacle into the prescribed decorative shape. The wall structure is transparent and configured in such a manner that when the receptacle is substantially filled with visually opaque particulate medium, the medium takes the form of the prescribed decorative shape and is visible through the wall structure. The decorative shape will visually appear to be in a solid, self-supporting state, and the wall structure will be substantially invisible.