If the salinity doesnt vary why did they recommend after testing at Westpark years ago that people throw salt into their toilets to enable the Electrosan 's to work as designed ?
I don't know, I don't use an electrosan and I don't keep a boat in Westpark.
Did your electrosan work after throwing salt in it. Maybe you were too hydrated (from drinking too many chilled beverages) and there weren't enough ions in your pee to make the electrosan get its ergs from its anode to its cathode?
Or maybe electrosans aren't that great and the salt thing was a distraction.
You do realise electosans aren't used for antifouling?