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Amazon.com : Pentair 178560 Almond Bottom Assembly Replacement Clean and Clear Pool and Spa Aboveground Cartridge Filter : Outdoor Spas : Patio, Lawn & Garden
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Amazon.com : Penn-Plax Undergravel Aquarium Filter for 40-55 Gallon Tanks – Four 11.25” x 11.25” Plates – Under Gravel System for Clear, Clean Water – Safe for Freshwater and Saltwater Tanks : Aquarium Bottom Filter : Pet Supplies
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Bottom of my Brita filter where the water flows out into the pitcher- what are the yellow dots? : r/whatisthisthing
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