lol, yes you are correct.

We always call that potential. If the potential is there all you need is someone to complete the circuit. Once that happens you are instantaneously aware of the problem as it attempts to travel through your arm at something less than 186,000 miles a second. When I work with voltage in the house I typically don't turn off my circuit... I just work with one wire at a time and remain ungrounded (wearing shoes and not touching anything that may be grounded). Doesn't always work and occasionally I feel the bite, but it does save me a trip upstairs to turn off the breaker.

Here's where I'm foggy. If the potential is there, but no path to ground... why are the fish affected? I know they are, and have seen the HHL thing on one of my fish when I first started in the hobby. But why is it an issue?

And on another note, the other day when my pump went out and I started feeling the shock... none of my fish reacted to it. Why is that? Coral and fish were perfectly (on the surface) unconcerned with the current in the water.