Features: The Pneumatic Sponge Filter utilizes advanced pneumatic technology to deliver efficient mechanical and biological filtration, effectively removing debris and maintaining unambiguous water quality for marine environments. Crafted with permanent, food grade PC construction, this wear resistant filter integrates a smart breath driven mechanism that requires minimal effort to activate, ensuring unfailing execution in freshwater and marine setups. Ideal for aquarists of all levels, this low maintenance solution caters to hobbyists maintaining community tanks, breeding facilities, and tiny aquariums where space efficient filtration is essential. Perfectly suited for small to average sized aquariums, the compact design operates silently alongside standard air pumps, optimizing oxygenation while trapping particulate waste in planted tanks and shrimp habitats. Engineered with multi stage filtration capabilities, this environmental conscious device reduces water change frequency by sustaining balanced compound cycles, promoting healthier fish and bright marine creatures through continuous biofiltration. Specifications: Component: Plastic Product Category: Filter Cotton/Filter Size: The size is shown in the figure below Specifications: D01 Small trumpet cylindrical water fairy, D02 average trumpet cylindrical water fairy, D03 Large trumpet cylindrical water fairy Package Includes: 1x Water Fairy Filter note: Please allow 1-3cm errors due to manual measurement. Due to the difference betweeen different monitors,the picture may not reflect the actual color of the item.