Patent ID: 7429321
Filing Date: 2008-09-30
Classification: A01K

Abstract:
1. A removable filter cartridge for cleaning aquarium water in an external-type aquarium filter system having a canister and a spillway, the filter cartridge comprising: an housing having a first and a second spaced-apart walls; an entrance at a lower portion of the first wall, the entrance having a lowermost portion and an uppermost portion; an exit at an upper portion of the second wall, the exit having a lowermost portion and an uppermost portion, the lowermost portion of the exit being substantially level with the spillway and being above the uppermost portion of the entrance; and a filtration medium for providing filtration functions for the aquarium water, the filtration medium disposed in a space defined between the first wall and the second wall; wherein the water follows a substantially S-shaped path between entering the filter cartridge from the canister and exiting the filter cartridge to the spillway.