Product: EHEIM - 4003660 - Diffusor for hose diameter 9/12 mm, for filter 2211
Instrument by the small size but with great performance
Indeed this diffussore air venturi system exploits to make large amounts of O2 in your aquarium, supplied through a tap, you can adjust the amount of O2 by assessing the needs of your aquarium.
This kit comes complete with suction cups, silicone tubing, faucet control of air input and speaker.
Easy to assemble Just apply pipe pump.
The speaker is transparent and in the aquarium you will not notice.
As always Eheim provides effective tools for enthusiasts with solutions very cheap.