AQUAPAPA Bio Sponge Filter for Betta Fry Aquarium Fish Tank Up to 30 Gal each, Double Sponge Design, 4 -Pack

This Aquapapa double design sponge filter provides both mechanical and biological filtration. The aerobic bacteria colonize the sponge and help break down harmful waster such as ammonia and nitrite. Also, the air infusion chamber produces minute bubbles which increase the oxygen solubility.

Easy to set up and clean: Simply install an airline into the unit and turn on the air pump, simply rinse and squeeze sponge in tank water. Recommend tank size: Up to 30 gallon each, excellent for small size fish like dwarf cichlid, guppy, killifish etc., or for hatcheries, maternity tanks, and fry tanks, as the filter produces minimal current and has almost no way to suck the fish through the filter. Product dimensions: 4"L x 1.8"W x 6.25"H: Sponge Dimension: 1.8"D x 3.0"H. Package includes: 4 pcs of sponge filters only. ( Air pump and airline tubing are sold separately, not included).