David Combs wrote:
In article ,
wrote:
Generally speaking, you don't want anything with a motor on a GFCI. I
don't think the fishtank pump motor is big enough to matter, though.
The reason I suspect the fishtank for tripping the GFCI is the
abundance of water and humidity involved. If the light fixture gets
even slightly damp, it could trip the GFCI.

Motorize items that should never be plugged into a GFCI:
Sump Pump
Well/Cistern Pump
Refrigerator/Freezer
Garage Door Opener