Shock tank?

[Logical1]

I guess my GFCI is not working. I shocked three bushels for a party in my driveway. It never tipped the breaker.

The GFCI measure a difference in the current levels on the Hot and the Neutral. You have set up a tank with a large volume of water, this is being seen as a load not a short nor is it detecting a current differential between the two conductors. If one of the wires had a bare spot in the insulation and was touching wet ground, the GFCI would trip.  If you moved the electrodes in the water very close together then it would see that as a short and likely trip due to going beyond it's current handling capacity. Also, if you connect a GFCI in reversed polarity, many times they will work one time as the internal components are destroyed from incorrect current flow.

[Wallco99]

I guess my GFCI is not working. I shocked three bushels for a party in my driveway. It never tipped the breaker.

Fire waiting to happen.

[Logical1]

Fire waiting to happen.

At a minimum I would want to have an electrician check the circuit to ensure that the breaker is operating properly and sized correctly. Breakers can fail closed (they will not trip).

[Wallco99]

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