This is a discussion on submersible heaters? within the Freshwater Aquarium Equipment forums, part of the Freshwater Aquarium category; -->
thanks, i just wasnt sure if anyone has had like, the top of a heater come loose and water getting in or sumthing, but ...
I've never had a problem. But it's also probably a good idea to have all the electircal stuff for the tank go through a GFI outlet just to be on the safe side. (In case you put your hands in the tank like I do)