Aquarium Sponge Filter 5-20 Gallon Fish Tank Filter, Electric Power Double Sponge Filter, Quiet Small Low Flow Foam Filter for Fish Tank Betta Shrimp, Intake Dual Sponge Filter Kit W/Pump. Quiet& Wide Range Of Application: this dual head bio sponge fish tank foam filter is suitable for both saltwater or freshwater, especially for colorful fairy, small fish, shrimp tanks, betta tanks, goldfish.
eBay