That was an interesting read, Larry. Thanks for posting it, definitely some great information in there.
For those that don't want to read through the whole thing, the last paragraph basically sums it up...
"So in summary overall the safest for the aquarist will be the installation of AFCI, GFCI and Ground Probe. The safest for the inhabitants will be AFCI and GFCI without ground probe. This is the reason why many aquarist do not use ground probes (but will always use GFCIs) specially traveling ones that stay away for extended periods of time. If you have a remote alarm system installed that may page you or send you an E-Mail in case of a fault (Like the aqua controller from Neptune Systems) you shall have no doubts and have your Probe installed with your GFCI's)"
Credit: Reef Central Online Community - View Single Post - Grounding probe? waste of money?