Did you try giving it a good thump? It is a fairly common problem and that works for many. Additionally, have you had it over 6 months and if so when is the last time you did maintenance on it?it seemed to jam the propeller wouldn't spin, i messed and messed with it. i know it works cause I hear the motor but the propeller just won't move. who would i call about this? any ideas about the nem?
Hydor USA inc.
4147 Northgate Blvd, Suite 6,
Sacramento, CA 95834
USA
ph. 001 (916)920-5222
fax 001 (916)920-5522
hydor.usa@hydor.com