Abstract: An aquarium overflow system includes a standpipe with snap-fit mounting constructions, an air vent, air and water apertures, and an adjustable height version.

Abstract: An aquarium overflow system includes a standpipe with snap-fit mounting constructions, an air vent, air and water apertures, and an adjustable height version.

Abstract: An aquarium base is provided by a base member (26, 26a) extending horizontally around a periphery generally coextensive with the periphery of the aquarium tank (22, 22a, 22b), the base member having a lower surface (30, 30a) resting on a horizontal support surface (28), and an upper surface (32, 32a) upon which the aquarium tank rests. The base member has a peripheral skirt (34, 34a) extending generally vertically between the upper and lower surfaces and around the periphery. The peripheral skirt has an upper extension (36, 36a) extending upwardly from the upper surface vertically along and adjacent and outward of the aquarium tank. The peripheral skirt has a first periphery (72, 72a) at the lower surface, and a smaller second periphery (74, 74a) at the upper surface.

Abstract: A float actuated water level control valve has a sliding valve tube depending from a float to meter the amount of water flow through the valve proportionally in response to the position of the float. The valve is especially useful for controlling the water level in an aquarium overflow filter system. The valve inlet has an adjustable flow area which is defined as the area between a lower edge of the sliding valve tube and an upper edge of a drain. The configuration of the lower edge of the sliding valve tube and the upper edge of the drain are selected to provide increased flow area linear to the position of the float. The valve inlet is submerged, and drain gurgling sounds are thereby muffled. In addition, the valve maintains the water level within the reservoir at a height above the valve inlet, which is especially useful for reducing splashing sounds from water spilling over an overflow wall in an aquarium.