jneg, not sure why you provided a link to a GFI breaker? That doesn't protect a whole house, just a single circuit, like to the bathroom outlets.
Grounding rods to not have to be tied into the house. Their only purpose is to give shorts a good path so all of sudden the current shoots way up which any breaker can detect.
I've never said that these covered the whole house and if you read my reply I said that. I said that I've seen circuit breakers with GFCIs integrated and the places where I saw them used they where used to cover only bed rooms.
We use the same NEC code as in the States always the latest edition (2011). I use the titanium probe inside aquariums and in my pond, it is made from Ti just because of that. I don't know what the big deal is, I have had many shocks provided by faulty lighting wiring, bad pumps, heaters in bad conditions in aquariums. I know that it is not the best thing but if I am going to put a hand inside water that I don't know if there is a stray current flowing I prefer to have it than get a small shock. BTW I didn't consider wiring and everything else as equipment, if you go that way then its ok by me.
We are all saying the same basic thing, that we need to protect ourselves with GFCI in our ponds.