Personally I think there are a lot of people that should have hearing tests.
I've had quite a few different Eheims and they all make a humming noise, it's not possible to make something like that absolutely silent. Having said that they make only half the noise that Fluval make, never had a filstar.
I've had quite a few different Eheims and they all make a humming noise, it's not possible to make something like that absolutely silent. Having said that they make only half the noise that Fluval make, never had a filstar.