Apex salinity probe trick...

[Jhoussock]

I was struggling for a while on how to keep the interference from other electrical from interrupting my probe. I would get it right but over time the wires would move around and it would start reading zero. I was moving things around when i had the idea to put all my extra probe cord between my dosing bottles and my sump. It’s been rock solid ever since. The glass and liquid seems to act as a good Insulator. Thought I would share....

 

[rkpetersen]

Yup, that would work.
Or, if you can't reroute it, you can wrap it in aluminum foil which will also help a lot.