Petworx Bio Sponge Filter - Mini 3.5cm Dia x 2cm
Using an airlift system, the sponge filter features quiet operation, easy setup with excellent filtering effect while oxygenating the water. 
The specially developed foam material supports the colonisation of bacteria, allowing for mechanical & biological filtration which will break down harmful waste reducing ammonia and nitrite, resulting in a safe environment for your fish
Sponge filters can be used for breeding and is suitable for raising baby fish & shrimp and for tubbing axolotls .
Comes with :
mini bio sponge 3.5cm diameter 2cm high sponge
4 cm uplift
1 metre airline hose
control valve.
*airpump sold separately