Aquapapa 4X Dual Bio Sponge Filter for Betta Fry Aquarium Fish Tank Up to 30 Gallon Each (Dual Sponge Filters 4-Pack)

Provides both mechanical and biological filtration for your tank. The air infusion chamber produces minute bubbles which promote gas exchange process and increases dissolved oxygen level in water.

Easy to set up - Just connect the unit with an air pump thru an airline. It provides both aeration and filtration for your tank (air pump and airline not included).

The sponge traps waste particles mechanically and cleans the water without trapping baby fish. It keeps water clean and clear.

Product dimensions: 5.0”L x 1.8”W x 5.5”H; sponge dimensions: 1.8”D x 3.0”H. They are useful for as breeding filter or as secondary filter. Or they can be used as pre-filtration unit by fitting to an external or a top filter.

Max tank size: up to 30 gallon each filter. Package includes: 4 pcs of Sponge filters in a poly bag. ( Air pump and airline tubing are sold separately, not included).