Originally Posted by Bige
Change as much water as possible. Clean all the metal balls out. Put in carbon and copper/heavy metal remover. You may want to do another 50% water change in 3 days or so. Unplug thermometer before putting hands in tank.
I think it is just a thermometer, not a heater. Probably nothing to unplug. I used to leave mine float in the top, but had a snail grab on to it, and use its weight to drag the thermometer down to the bottom. Of course right onto a piece of LR
, and broke a piece off. I didn't lose all the balls, just broke a piece of glass enough to get water in there so it wouldn't float anymore. I just took the thermometer out, scolded the snail and that was that.