I came home and my tunze 6060 had stopped working. I took it apart and there is no calcium buildup. It was plugged in directly to the wall outlet (i.e. no power bar). I am leaving it unplugged overnight in hopes that I am crazy, but I was wondering if anyone has had this issue before. Am I going to have to buy a totally new pump, I have only had it for a month or so... Thanks in Advance