Sieral Undergravel Aquarium Filter for 15-20 Gallon Tanks, 8 Pcs 5.7'' x 5.7'' Plates, Under Gravel System for Clean Water, with 2 Uplift Tube and 1 Filter Cotton, for Fish Tank Fresh and Saltwater

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About This Comprehensive Package Contents: this under gravel aquarium filter set includes 8 black undergravel filter plates, 2 adjustable lift tubes, 2 straight air tubes, and 1 cu stomizable activated carbon filter sponge; All components are designed to work together for efficient filtration in various aquarium setups Customizable Sizing Options: the fish tank filter plates measure about 5.7 x 5.7 inches each, and these uplift tubes can be adjusted from about 12.6 to 20.08 inches; With large tubes at about 0.87 inches and small tubes at about 0.79 inches in diameter, and the size of filter cotton is 4 x 4 inches, this undergravel filter offers flexibility for different tank depths and layouts Dependable Material Composition: these bottom sand filter plates are made of PVC, slightly submerged, with good toughness, ensuring long-term use in the aquarium, the filter cotton is an activated carbon sponge, which can effectively help you filter impurities Modular Design for Adaptability: the plastic grid plates allow users to separate and combine filter media types, optimizing water flow and substrate stability; The 8 pieces can be freely combined into any size you want, and assembled into two rows of 4 pieces, suitable for most 15 to 20 gallon aquariums Ideal for Large Aquatic Species: this under gravel aquarium filter is well-suited for large fish such as Arowanas and marine species; Its design supports a healthier habitat by enhancing water circulation and maintaining a clean substrate environment Show more