If u used same device on Sps if there are any unwanted AEFW they will move or release. Once my fish figured they wait to see if it’s a free meal. Just a quick zap or two and if u have any u will see them move.What is this zapping the tank proccess you describe, I've never heard of it beyond the zapping of aptasia. I doubt I would zap anything with my fish in it lol, but it does sound kinda interesting as you described it.
Still lot of work.
Come to think about it I made my own with a 9 v battery and micro switch and leads. Just make sure everything is insulated only the tips exposed.
Remember the current ones between the two tips
So if you have it in the water on the both ends it will produce a shock throughout the tank, even though it would be mild because of the voltage.