Abstract: A water filtration system includes an auxiliary filter assembly having a single inlet connected to the water lift tube of an undergravel filter and an outlet connected to a submersible electric water pump which causes the water within an aquarium to flow through both the undergravel filter and auxiliary filter assembly before being recirculated back into the aquarium.

Abstract: A filter adapted for use in a fish culturing tank, the filter including a filter casing, a pump mounted on top of the casing, and an attachment interposed between the casing and the pump which has an inlet portion extending in the casing through the attachment to suck the filtered water therein and an outlet portion for returning the filtered water to the tank, the attachment having a first means for allowing the inlet portion of the pump to pass through, and a second means for connection to the casing.

Abstract: An external aquarium filter having a housing which is mountable onto a wall of an aquarium tank. The housing includes an intake compartment and a filter compartment which in turn includes a contaminated water chamber receiving contaminated water drawn into the intake compartment from the aquarium tank and a filter chamber for filtering the water. A motor unit supported at the filter housing has an impeller which sits into it depending from a collar which fits into the intake compartment of the filter. The impeller draws water from the aquarium tank into the intake compartment of the filter. The impeller is encased in a tubular collar. The tubular collar has two opposing windows. The window, which faces the front wall of the intake compartment, is offset in a clockwise direction, as viewed from above, relative to the window which faces the rear wall of the intake compartment, to effectively close off the right edge thereof, to thereby reduce turbulence in the water flowing in the filter.

Abstract: A bucket-type shaped container including a removable top and downwardly facing suction cups is provided for disposition within and suction cup support from the bottom of a reservoir containing water and bait. The side walls of the container include a large number of water inlet openings formed therein and a flexible panel of filtering material is formed into generally cylindrical configuration and snugly telescoped within the container. A flexible resilient panel member is flexed into generally cylindrical configuration with overlapped ends and is telescoped into the cylindrical filter panel and includes openings formed therethrough registered with the container wall openings, the flexible panel member exerting an outward biasing force on the filter panel.

Abstract: A filtration system for an aquarium is shown which includes a biological filter chamber having an inlet supplied with aquarium water to be filtered, an outlet for returning filtered water to the aquarium, and an interior containing a biological filter medium. A trickle plate is located at the inlet to the biological filter chamber for supplying an even distribution of water to the filter medium. A stationary spray bar located above said trickle plate and connected to the inlet, the stationary spray bar being provided with apertures for supplying water to the trickle plate. A reservoir chamber is located below the biological filter chamber and contains a protein skimmer and one or more supplemental filter stations for further filtering the water before recirculating the water to the aquarium.

Abstract: An aquarium water purification system comprises a porous or slotted platform raised from the bottom of the aquarium. A low density foam member having land areas and openings therein is affixed to the bottom of the platform. The foam member promotes bacterial retention and growth thereon of waste metabolizing bacteria. Means are also provided to circulate the water from the aquarium through the foam member and through an external filter.

Abstract: Apparatus comprising a base member fixed to a swimming pool wall in operative proximity to a skimmer inlet opening and having a permanent magnet plate embedded therein, and a bracket member having an iron plate embedded therein. An elongated deflector, carried by the bracket member, deflects and guides surface-water-borne dirt, leaves, pollen and other debris via circulating pool water into the skimmer inlet opening. The attractive force exerted by the permanent magnet plate towards the iron plate allows adjustable and fixed relative positioning, vertically, laterally and/or radially, of the bracket member with respect to the base member, and, hence, the deflector. The bracket member and deflector have cooperating means to allow lateral angular positioning of the deflector. Appropriate radial positioning of the deflector creates an inherent force component causing subsurface dirt, leaves, pollen and other debris to rise to the surface to be carried into the skimmer inlet opening.