Quote Originally Posted by takagari View Post
i never said i scould or wasnt. Its something i'm looking at experimenting with. and if I put it on a GFI i'm sure its perfectly safe.

i dont see why it wouldnt heat the water? and if its kept at a lower temp it wouldnt beed enough head to crack the glass...

explain why you think this? maybe if the water was ice, and i applied it at full heat.
A GFI would certainly protect you against a specific type of electrical hazard. The serious danger would present itself when you tried to wire enough flexwatt (fed from standard duplex wall outlets) to heat a regularly sized aquarium.

The amount of energy it takes to heat water is tremendous. It is ridiculous to imagine the amount of heat tape it would take to heat a standard size aquarium, especially when it is recommended that the user keep the Flex-Watt at 95 degrees or less to reduce the risk of fire.

There is a reason that most household water heaters have a heating element that is rated between 4,000 and 5,000 watts. Buy a titanium heater that is made for aquariums. Its safer, cheaper, and people will take you more seriously.