Yea, I'm kind of confused.
My shock experience was with a set up I don't have anymore. The outlets were grounded.
I never feel it with either of my current systems. When I started thinking static electircity, I also thought of a dirty ground probe so I cleaned it for 24 plus hours in vinegar so it looked brand new. Made no difference. Maybe some sort of steady current in the rug or concrete floor??
Whatever the case I am pretty sure that I only felt the shock when the carpet was damp from sloppy top off's and water changes. I'm not walking on a wet carpet anymore and I don't get shocked anymore.
Anyone more electricially educated than I, know if something can ground through two things at once, or if the electricity will just find the easiest path?
I guess whatever the explanation, standing on a wet carpet with your hand in a bunch of salt water with many electrical dodads submerged is asking for trouble anyway (at least slightly stupid). Maybe it would be a good tip for reefers to wear thick rubber soled shoes when messing with their tanks. Someone could even market special "reefing shoes"
Maybe the wet carpet has nothing to do with it?
Just thinking out loud.