[DETAIL] 1. Sponge filters provide both mechanical and biofiltration, also, the air infusion chamber produces minute bubbles which increase the oxygen solubility. 2. Safe for fish: Soft sponge material, traps floating debris, and won't suck up your fish. 3. Easy to set up & clean: Simply install an airline into the unit and turn on the air pump, simply rinse and squeeze the sponge in the tank water. 4. Recommend tank size: Up to 20 gallons, excellent for small-size fish like betta, dwarf cichlid, guppy, killifish, etc., or for hatcheries, maternity tanks, nano tanks, and fry tanks, as the filter produces minimal current and has almost no way to suck the fish through the filter. 5. This product effectively reduces the noise generated by the air pump and consumes less power, ensuring a more peaceful and cost-effective operation. 6. It boasts a user-friendly and easy-to-clean design, with replaceable filter cotton for hassle-free maintenance. 7. Additionally, it increases oxygen solubility without causing any distracting operational noise. Package Includes: Name: Biochemical Cotton Filter Material: Bio Sponge, Plastic Specification: #180, #280, #380, #2835, #2836 Feature: Need to connect to air pump. Usage: Filtration/Oxygenation/Bacteria Cultivation Quantity: 1Pc WARNINGS 1. Due to different computer display colors, the actual color may differ slightly from the above pictures. Thank you for your understanding. 2. Please allow slight dimension differences due to different manual measurements. Thank you! PRODUCT PICTURES [ATTRIBUTES] - Hign-concerned Chemical: None - Origin: Mainland China - Power (W): 1 W - Hign-concerned Chemical: None - Origin: Mainland China - Power (W): 1 W - Type: fish - Name: Biochemical Cotton Filter - Material: Bio Sponge, Plastic - Specification: Type 180, Type 80, Type 380, Type 2835, Type 2836 - Usage: Filtration/Oxygenation/Bacteria Cultivation - Feature: Need to connect to air pump. - Application: Excellent for small-size fish like betta, dwarf cichlid, guppy, killifish, etc., or for hatcheries, maternity tanks, nano tanks, and fry tanks. - Quantity: 1Pc - Model Number: SX000685-SX000694