Our boat is now at a marina in fresh water and currently does not have any anode protection on the prop shaft. A barrel shaped anode will not fit on the shaft due to installation of a line cutter system. Just got off the phone with a leading marine corrosion company where I asked him about possible solutions and he said I didn't need any. I asked him about possible stray galvanic current in the marina either from your neighbors boat or stray current from shore power pedestals. He said not to worry about it. Am I nuts or is he nuts? Thanks for your comments!!