The hygger Bio Sponge Filter is a medium-sized foam/sponge filter designed for aquarium fish tanks up to 55 gallons. It is made of durable plastic and features a corded electric power source. The filter is suitable for all water types and is equipped with a California Prop 65 warning. The hygger Bio Sponge Filter is easy to install as a corner filter in the internal location of the tank. Made by the trusted brand hygger, this filter is a reliable and efficient option for maintaining clean and healthy water in your aquarium.