The Betta AP- 4500 Silent Aquarium Air Pump is recommended for aquariums up to 150L.

Suitable for use with standard 4/6mm airline and compatible accessories such as Betta Air stones Air Curtains
air- operated aquarium ornaments plus under- gravel and other air- driven filters (not included).
It is great for increasing the oxygen levels in your aquarium.

Features:
Easy adjustable flow
Build- in labyrinth airflow buffer
Works smoothly and silently
With IPX4 waterproof design
Suitable for indoor use
Suitable for: aquariums up to 150 litres
Diameter: 4/6mm airline
Watts: 4. 8w