That sucks. Did ML move to china or somethin? Well, whatever the issue i have not used a ML heater ever, i dont know why, i just havent. Although i have had heater failures in the past they were usually in/during times when i was nearby and did not lose fish. Stupid heaters, maybe ML will have a callback on the heaters? I hope the tang makes it, i know how upset i would feel if my largest goldfish was to die (he survived am incident that killed all the other fish in his tank) or if my smaller male Mollie was to die (he is the only mollie that survived my tank from birth to breeding, and a symbol of my success with mollies). Good Luck with your fish!