i bought a used Tunze 6060 about 4 months ago. the seller told me it was a few months old when i got it. it has worked fine over the last 4 months and was never on a timer or wavemaker. i would only turn it off at least once a week for cleaning. today it suddenly stopped working. i tried cleaning it and soaking in vinegar with no effect. what should i do? does anyone know what could be wrong with it? it's really frustrating. i thought these were supposed to be very reliable products.


