Thanks guys for relighting the sparks on safety and government protection verses "how a GFCI safety measure killed all my fish" when the power faulted away!
@thatmanMIKEson @CanuckReefer Thanks for your opinions and knowledge and application information.
I put in an additional 240 circuit for my tank, split that down the line into 2 110 GFCI protected power plug runs. One of those was too close to the splash zone and melted a plug on the wall but did not trip the circuit or breaker. I have reached into the tank and been biten by stray current and again the GFCI didn't trip. I know that "can't happen" in theory but I don't have any electric eels that I might blame for the zap!
Feel free to come check out my fine home wiring!

thanks for reminding folks to always get their stuff checked out by a qualified electrician!