ALEGI 4pcs Large Aquarium Sponge Filter with Suction Cups, Check Valves for Breeding Fry Betta Shrimp Fish Tank (Medium for 20-50 Gal 4 Pcs)

Features

• Sponge filter provide both mechanical and biological filtration
• Easy top set up & clean: simply install an airline into the unit and turn on the air pump, simply rinse and squeeze sponge in tank water
• Using an air hose, connect one end to you air pump and the other end to this filter,and equipped with a check valve on air hose, to prevent water backflow and air pump damage due to power outage. It is a great way to clean and oxygenate your fish tanks.
• Recommend tank size: 10 Gallon
• Includes: 4 Pcs of sponge filter, 4 Non-rutrun check valves,4 contral valves, 4 suction cups