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Amazon.com : Penn-Plax Cascade All-in-One Aquarium Canister Filter – for Tanks Up to 100 Gallons (265 GPH) – Cascade 1000 : Pet Supplies
Penn-Plax Cascade 600 Filter Replacement Bio-Sponge (1 Sponge) – Provides Physical and Biological Filtration for Freshwater and Saltwater Aquariums : Aquarium Filter Accessories : Pet Supplies - Amazon.com
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Amazon.com : Penn-Plax Cascade All-in-One Aquarium Canister Filter – for Tanks Up to 100 Gallons (265 GPH) – Cascade 1000 : Pet Supplies
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Amazon.com : Penn-Plax Cascade Canister Aquarium Filter (1500 Elite) : Pet Supplies
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