Features: This compact aquarium filter integrates reverse airlifts oxygenation technology to boosting dissolved oxygen levels, promoting health while maintaining clear water through multi stage mechanical and biological filtration. Engineered with stackable biological media chambers and quiet operations under, its space efficient plastic construction suits tanks to 30 gallon aquariums without compromising water circulations efficiency. Ideal for freshwater hobbyists maintaining bowls, planted shrimp tanks, or community aquariums seeking low maintenance biological filtration with enhanced gas exchange capabilities. Perfectly operates in homes/office desktop aquariums, effectively removing fish waste and food residues while cultivating beneficial nitrifying colonies for balanced ecosystem. Crafted from ABS plastic, this oxygenation device securely anchors to tanks wall with suction cups, requiring minimal energy consumption (under 3W) for water purification. Specifications: Color:Three Choices Dimension:6.5×9cm/2.56×3.54in 6.5×11cm/2.56×4.33in 6.5×13cm/2.56×5.12in Component:plastomer Package Includes: 1pc Aquariums Filter note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.