Sieral Undergravel Aquarium Filter for 40-55 Gallon Tanks, 16 Pcs 5.7'' x 5.7'' Plates, Under Gravel System for Clean Water, with 4 Uplift Tube and 1 Filter Cotton, for Fish Tank Fresh and Saltwater

Features: The adjustable lift tubes and straight air tubes simplify installation and fine-tuning. Filter sponges can be trimmed to fit specific needs, making this fish tank filter system adaptable to various aquarium configurations. By utilizing both mechanical and chemical filtration methods, this undergravel filter helps maintain water quality. The activated carbon sponge reduces impurities, while the grid structure supports beneficial bacterial growth. Specifications: Material: PVC Color: multicolor Size: Undergravel filter plates: about 5.7 x 5.7 inches Uplift tubes: adjustable from about 12.6 to 20.08 inches Filter cotton: about 4 x 4 inches Package includes: 16 x Undergravel filter plates 4 x Uplift tubes 4 x Straight air tubes 1 x Filter cotton Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.

• Comprehensive Package Contents: this under gravel aquarium filter set includes 16 black undergravel filter plates, 4 adjustable lift tubes, 4 straight air tubes, and 1 customizable 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 16 pieces can be freely combined into any size you want, and assembled into two rows of 8 pieces, suitable for most 40 to 55 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