1.Simply install a small filter for the fish tank connect this filter, provides filtration, a great way to clean and oxygenate your tanks. 2.You can take down the sponge from the filter, easy to clean or replace it. Sponges filter traps floating debris and protect your baby fish from being sucked up into the small filter for fish tank. 3.The fish tank filter is small in size, does not occupy space, and adopts silent mode, which does not produce any noise at all when working. 4.Filter aquarium while increasing oxygen, it can also filter water and keep the water clean. 5.Application:Sponge filter is suitable for fresh and sealtwater, ideal for aquarium and fish tank, a great gift for your friends and family. Key Features: - All parts of the aquarium filter are detachable so as to clean. - Perfect for shrimp tank, betta tank, breeder tanks, turtle tank, goldfish, discus, crayfish, fry, baby fish, or other fish. How to Install: 1. This product needs to be connected to the air pump and equipped with a check valve on the airline tube to prevent water return to the air pump due to power outage. 2. Please choose suitable air flow tube. Package Includes: 1 * Sponge Filter for Aquarium 1 * Suction cup Kind Reminder: 1. Squeeze the sponge filter in tank for 5 mins for 1st using. 2. Recommend replacing the sponges every 6-8 months.