"Mariachi" wrote in message
oups.com...
I have noticed in the past few days that my filter is causing a low
buzzing sound from vibrating in the tank. I have one of those internal
filters. I don't know what it is but sometimes you can it vibrating
against the tank and you can feel the vibrations if you put your hand
on the tank glass. I was just wondering if that is really bad for the
fish? I just spent 20 mins moving the filter around moving it's cable
around so it doens't touch the lid etc but I can't make the sound go
away. usually it's because the power cable is touching the lid and
causing the lids to knock together but not all the time.


It sounds to me that your filter is out of balance. Try cleaning the
impeller and the well.

To answer your questions, a fish's hearing is more sophisticated than
ours as they have 2 systems, ears and lateral line receptors (to help
identify magnitude and direction). This allows many to feed in the dark,
and blind fish to eat with little hindrance. Having said all that, they
probably tune out any sources of constant noise (vibration) just like we
do (ie: white noise). Intermittent noise would be harder for them to
become accustomed to.
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