Help! I've just tried setting up my brand new Aquaclear 50 and it just stopped working! :-( I followed all the instructions, connected everything, filled the unit with water, plugged it in, it ran for about 2 minutes then just stopped. I noticed it was very rattly sounding when it was running but thought it might just need a few minutes to settle. I heard a click then it just stopped running :-/ when I unplugged it the motor unit was very hot. I've tried repositioning the impeller and plugging it in again but no luck :-( I'm not sure if it could be because the unit has an American plug and I'm using at adapter to an Australian plug? Did I fry the motor?