inline heater very loud- normal?

[Nano]

Anyone using hydor inline heaters? If so have you noticed any noise like a loud long annoying buzz that comes from it when it kicks on and can be heard from outside the house. :lol: I'm guessing this isnt normal so i've shut it off and tossed in a ebo for now. Any way to fix this? Its sitting upright as it should& is plumbed correctly. Did I get a bumb heater? Or is this just a price I pay for having an inline?

Any help is appreciated- if you have a suggestion for either a better inline or stealthy in tank heater please let me know.

Thanks everyone

[Magickiwi]

Stealth and heaters don't seem to go hand in hand do they? I would've liked to use a Hydor but the reviews I've read on them don't seem to be very favorable.

I bought an Aquatherm for my daughter's nano tank and it has the smallest footprint I've seen so far. Best of all they are relatively inexpensive and includes a controller.