What do you use to measure voltage in the water? What kind of meter?

The Profilux probes are galvanically isolated which means there should be no voltage coming through the probes. If the Profilux is new I would send it in for repair. If used, I bet saltwater or saltspray has corroded it.

It's a few years old and been sitting in the sump cabinet so it probably corroded some stuff. It's pulled out now and I'm not getting and weird current anymore. It is a little bit of an older model so an upgrade is always better right? :lol:

I use a fluke 1587 multimeter

Hello

One probe in water and another against ground from the wall socket?

Titus