Environmentally friendly high-grade sponge material for superior filtering effect. Increased number of filter layers and folds for efficient impurity adsorption. Built-in filter stone and air pump for effective oxygenation and water quality. Airflow groove design drives water flow movement, increasing oxygen levels. Ideal for maintaining a clean and healthy environment for fish in your tank. Description: Introducing our multi-functional aquarium filter, perfect for the breeding and feeding of various ornamental fish, shrimp, or fish fry. Made of environmentally friendly high-grade sponge, this filter actively adsorbs impurities, filters fine matter, and quickly purifies water. With more folds and an increased number of filter layers, it provides superior filtering effect. The built-in filter stone, combined with the air pump, effectively oxygenates and filters water quality. The airflow groove design drives the overall water flow movement, increasing the oxygen in the water. This aquarium sponge filter is easy to use and maintain, simply rinse and squeeze the sponge to fully absorb tank water to make it sink to the bottom. Don't miss out on this must-have accessory for your fish tank! Item Name: Fish Tank Filter Material: Cotton Features: Built-in Filter Stone, Rapid, Water Purification Size Details: S, L: 6cm/2.36", W: 6cm/2.36", H: 7.5cm/2.95" (Approx.) M, L: 6cm/2.36", W: 6cm/2.36", H: 10.5cm/4.13" (Approx.) L, L: 10cm/3.94", W: 10cm/3.94", H: 10cm/3.94" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Fish Tank Filter