Filter "Rattles" too much for skittish fish? too powerful?

[Retuks]

i know people say you can never have too much filtration. but i recently put a whisper 30 on my 10 gallon exodon tank.

exodons are like bala sharks and if you turn the lights on/off, walk by, make sudden movements they scatter around, kicking up sand and whacking their skulls against the glass.

the whisper 30 i have on there vibrates the tank alot and makes a rattling noise which i think is riling them up and over all stressing them out. i took it apart and cleaned the rottor, o-rings, and washed it clear of any sand particles and debris that could be making it have an annoying rumbling "errrrrrrrrrrrrrrrrrr" sound.

to compare i put my aqua tech 5-15 filter back on and it was MUCH quieter and didn't vibrate the tank at all. i ran the whisper 30 without water and plugged it into the wall to see if it was loose parts whacking the sides but it was quiet like a fan without any water in it. just as SOON as i put it in the water and fire it up it makes an annoying rumble that rattles the glass and man i wanna shoot whoever invented it...

any help?

 

[KeithNJ]

it could be the impeller. if its not the impeller put a thin piece of foam or rubber between the filter and the tank- that should muffle any rattling that occurs from the filter hitting the glass- good luck

 

[Retuks]

thanks, i put a few napkins under the filter where it hangs. it reduced vibration slightly but im still not comfortable.. and the noise is still there. i already took apart the whole impeller and reassembled it as stated above and when i ran the magnetic thingy on the impeller without the filter body it was silent as the dead. only when i actually use it it wants to act up and send unnecessary sound waves through the water... probably disrupting my exodons' predatory movement sensors and communications, driving them haywire...

its mocking me and wants to stress my fish...