Originally Posted by chucklesR
Far more damage is caused by your neighbor's boat's leaking current than by simple electrolysis in the water.
I say neighbor's boats because that's the way it works out - they are worse for you than your own boat.
You are somebody's neighbor too. Using your logic, that means you are the source of his problems.
When it comes to rapid zinc depletion and corrosion problems, everybody likes to blame the other boats around him. My experience, however, is that the most likely source for these issues is to be found aboard your own boat. That's where you should look first.
BTW- "electrolysis" is not something floating in the water. Further, it is not even the correct term for a common form of metal corrosion in boats.