Aquarium Filter, Fish Tank Filter for Small Tank, Small Internal Aquarium Filter, Submersible Foam Filter with Filtered Ceramic Balls, Small Aquarium Filter for Breeding Fry Shrimp Tank. This sponge filter is air pump driven, requiring at least a 2w air pump and an airline to operate (Air pump not included). The convenient plastic chamber allows for easy access to the filter media for maintenance or replacement. The Sponge Filter features a 2-stage filtration system, providing both mechanical and chemical filtering to keep your tank water clear and healthy. Our small sponge filter features a fish-safe seamless design with no moving parts, ensuring small fish are protected from being sucked up. It's perfect for shrimp tanks, fish tanks, or fry tanks, providing a safe and efficient filtration solution. In addition to filtration, this aquarium foam filter also aerates the water by creating bubbles. The gentle water movement is beneficial for fish that prefer slow-flowing water, such as bettas and fry fish, promoting a healthier environment.