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Amazon.com : Penn-Plax Cascade 1200 Aquarium Canister Filter, 315 Gallons per Hour & Cascade 1200/1500 GPH Canister Filter Aquarium Bio Sponge Replacement; 1 Pack : Pet Supplies
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Amazon.com : Penn-Plax Cascade 1200 Canister Filter and Optimizer Pre-Filter Aquarium Maintenance Bundle – Provides Physical, Biological, and Chemical Filtration : Pet Supplies
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Amazon.com : Penn-Plax Cascade All-in-One Aquarium Canister Filter – for Tanks Up to 65 Gallons (185 GPH) – Cascade 700 & Cascade 700/1000 GPH Canister Filter Aquarium Bio Sponge Replacement, 1 Pack : Pet Supplies
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