Was doing a water change and forgot I left it on started wiping down with the algae scrubber and I bumped into it and crack. Ordered a new one EHEIM Jager Aquarium Thermostat Heater 300W http://amzn.com/B003I5UC0W the heater that broke was a cheap tetra 50 watt that was always on since the day I plugged it in there is also a tetra one that is larger was wondering if it will hold the temp until mine arrives. It's the kind that auto shuts off when it reaches the desired temp.