Abstract: A power driven cleaning device for an aquarium includes filter suspended in the aquarium tank and through which water is circulated by an impeller. A first filter pad is followed by a filter cartridge, each of which spans the flow path, and which are clamped in place by a removable cover, for service.

Abstract: A beverage dispenser includes a source of pressurized carbonated beverage which is connected to a dispensing valve by a line extending through a refrigerated bath. In the bath, the line includes a thin-wall high-density polyethylene tubing portion having a wall thickness in the range of 0.018 to 0.028, preferably 0.025 inch, and a density in the range of 0.945 to 0.965, preferably between 0.95 and 0.96.

Abstract: A beverage cooling bath includes a refrigeration evaporator immersed in water for growing ice thereon, there being a beverage cooling coil disposed elsewhere in such water. In order to turn the refrigeration system off when a sufficient amount of ice has built up on the evaporator, there is provided a control for doing so which includes a motor-driven impeller that directs a flow of water into a tube which divides, the one portion having an outlet through which such water normally flows along a freezing surface on the evaporator, and the other portion being a branch that leads to a sensing control which is responsive to an increase of water level or water pressure therein as a consequence of ice forming to block the other portion leading to the outlet.