~ jan JJsPond.us wrote:
Roy, shows he doesn't know everything, typed:

Unnecessary derogatory comments snipped
More salt is in order....BGotta build up the electrolytes sp a better
cpnductive path can be had and then possibly your GFCI (if you have
one) will "TRIP" if its a common type GFCI device if not and its an
oddball then it will FLIP.

Electrical devices will bleed off minute amounts of charge that won't flip
a GFCI. At least that is what this product takes care of:

Rid-Volt Titanium Grounding Probe www.aquaticeco.com Part # TG10

****Description: Made of pure titanium, this specially designed probe
removes "stray voltage" generated by pumps, heaters, lights and other
electrical devices. A worthwhile safety device for live seafood tanks,
aquariums, hatcheries, garden ponds, etc. Noncorrosive titanium probe has
10' wire lead. Simply immerse probe in water and either plug into wall
receptacle or attach to grounding lug. Instructions included. End****

Most fish aren't bothered, but the ones that are, can be stressed and thus
act unusual (for Roy, oddball). Allowing fish to stay in this situation
most likely will lead to its demise over time, imho. ~ jan

Ignore the salt advice and go more along the lines of what Jan has posted.
I believe that device is generically called a grounding wand/probe, so you
will probably find more options than that brand. Personally, I would hire
an electrician who can measure for stray voltage and check that all the
wiring to the pond is safe and up to spec. Better yet, if you have friends
in the electrician field, see if one will come over and check the pond for
stray voltage. Then you can see if this is the problem or not.