Aquarium filtering system

Details Aquarium filtering system Aquarium filtering system

1986-03-10

1987-08-18

Fisher, Richard V.

Liquid purification or separation

Structural installation

Closed circulating system

2104162, 119 5, A01K 6304

Patent

active

046875751

ABSTRACT:
An aquarium filtration system includes an assembly of coaxial tubes within an aquarium which draws water through the conventional under-gravel filtration system of the aquarium, and communicates the initially filtered water to a fine-sand filter assembly located in a separate tank below the aquarium. The filtered water in the lower tank is then pumped upwards through the innermost tube of the coaxial tube assembly and returned to the aquarium. A water conduit, which surrounds the water supply tube, extends upwards to the desired water level of the aquarium, and conduit is axially adjustable to vary the water level. A casing surrounding the water conduit has an open bottom and allows water from the under-gravel filtration system to pass upwardly to the top of the water conduit, where it is drained to the filter assembly in the lower tank.

REFERENCES:
patent: 2594474 (1952-04-01), McGrath
patent: 4151810 (1979-05-01), Wiggins
patent: 4156401 (1979-05-01), Ogui
patent: 4333829 (1982-06-01), Walther
Author: George Smith, Marine Aquariums, Jan. 1986 Issue of Fresh Water and Marine Aquarium, pp. 35-42 and 84-85.

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