To quote the Bean;

Both GFCI receptacles and GFCI circuit breakers are also susceptible to nuisance tripping. Ballast and motor loads create a complex signature that sometimes confuses GFCIs into thinking a fault has occurred.

Most quality build, in-line pumps have no possibility of water-to-motor contact.
This is one of the reasons I have opted for in-line with my upcoming Fowlr.

And my heaters will only be immersed, not submersed

sitandwatch's grief only reinforces this for me

Yup my inlines have no water to power possibilities unless something springs a leak lol
I keep my jagger heads above the water line just incase... its the powerheads that i worry about now...and stray current from the salt to the light fixtures if its possible...
not enough for me to go GF or turn the power off but im aware of it lol

I had a submersed heater leaking current last summer in my 125g Freshwater, so it went for a trip to the recyclers
And because of possible powerhead leaks, and them being so ugly...
I just scored a pair of MP10wES from Ryan :biggrin:

Oops, sorry sitandwatch...Hijack