Aquarium Bio Corner Filter Air Pump Driven for Fry Shrimp Small Fish Tank up to 20 Gallon, 1-Pack

• How does it work?  Simply install an airline into the unit and provide both aeration and filtration for your fish ( Air pump and airline tubing sold separately). 
• Reduces noise from air pump and consumes lowest wattage.
• Multi-layers easy to clean and operate.
• Product dimensions: 4 inches D x 3.125 inches W x 6 inches H.
• Package includes: one filter.

Aquarium Bio Corner Filter Air Pump Driven for Fry Shrimp Small Fish Tank Up to 20 Gallon, 1-Pack

Descriptions:This filter is excellent for small size fish like dwarf cichlid, guppy, killifish, shrimp etc., or for hatcheries, maternity, nano tanks, and fry tanks, as the filter produces minimal current and has almost no way to suck the fish through the filter. Also, the air infusion chamber produces minute bubbles which increase the oxygen solubility.

The top layer of white filter pad provides a mechanical filtration. The black bio-sponge in the 2nd layer and ceramic rings with gravel provides biochemical filtration. They support the colonization of bacteria. The bacteria help to break down harmful waste (ammonia and nitrite).

The sponge will need to be rinsed every time it becomes dirty, about once every 2 to 4 weeks. It is helpful to reserve the beneficial bacteria by washing the sponge gently with water from the fish tank instead of tap water.