Wow. that's really upsetting. I'm sorry about your loss. :[
What's the name of the heater? I'd toss it but it would be helpful to the other members if you post the name so that we can aviod it and put it on our products black list.
A great heater is the Marineland Stealth
or the Hydor Theo
. If you get either of those get the 25 watt ones. They're for up to 5 gallons. =]
The marineland Stealth 25 watt is only available in stores but it is there. =]
Hydor theo 25 watt heaters are also sold in stores. =]