Yeah...I actually tried licking it once and I was stuck to the flagpole until May. :
I like the air pump/powerhead idea better just because a typical air pump or powerhead will draw something around 10 watts of power. A heater will draw anywhere from 10-100x that to accomplish the same job...significant extra cost there.
I like the air pump/powerhead idea better just because a typical air pump or powerhead will draw something around 10 watts of power. A heater will draw anywhere from 10-100x that to accomplish the same job...significant extra cost there.