I've had my FX5 working on my tank for maybe a month now and has been working great...I did a water change yesterday and cleaned the filter and now the thing wont work... I hear the motor working but there is no water pumping.. For some reason there is no suction at all out of the filter...I did as the directions said and nothing worked... I even pulled the motor off and checked the impeller and everything looked fine.... Even broke down the whole system and took the hoses out of the tank to start the FX5 like it was brand new and it still won't start.... I'm gonna call Hagen here in a bit when they open but was hoping one of the MFK'ers could give me a hand....