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Amazon.com : Penn-Plax Cascade Hang-on Aquarium Filter with Quad Filtration System Cleans Up to 10 Gallon Tank, CPF1 : Aquarium Power Filters : Pet Supplies
Amazon.com : Penn Plax Cascade Hang-on Aquarium Filter With Quad Filtration System Cleans Up to 100 Gallon Tank (CPF5), Cascade 300 : Aquarium Power Filters : Pet Supplies
