do you use a grounding probe?

[Gizmo]

Originally Posted by WWWD

the flipside of a gfi is that if it trips and your away from the tank it will stay off.

I keep my Heater, powerhead and actinics on a NON GFI Plug, just for that reason. They are also on a Computer UPS.

Originally Posted by mark

but I would suggest if there's any doubt in what you are doing, probably best to call a electrician.

When messin with salt water and power, and your unsure, safest bet for your livestock and YOU is to call a sparky.