Thanks to you both for your replies. My eventual (and succesful) solution was to take the powerhead back to the shop and ask for a new one. They tested it, and agreed that there was a fault - apparently the impellor wasn't operating correctly, even though it was brand new.
It has now been...
Hi,
I recently upgraded to a Juwel Rio 180. It's been set up for 2 weeks now, but I am yet to add any fish as the cycle is not yet complete (I'm feeding the tank).
The problem I have is that shortly after the tank was set up, the powerhead started making an annoying rattling noise. I've...