Just got diver report. Starboard hull Zinc is still like new (not good) so it is bad connection. Problem is the watermaker is installed on a new shelf that covers the whole area. Will have to move the water maker and the shelf it is bolted to for access.

Port side hull Zinc is down to 10%! It was about 50% 30-60 days ago. The bolts on the inside of the hull are accessible, but diver is afraid to take the bolts out while she is in the water.

Wasn't planning on a haul out for another 3-6 months for bottom job and various minor issues, might have to revisit.

Some Questions:

Does anyone else change these Hull Zincs while in the water? Seems like water intrusion would be minimal but again, diver is worried.

Should I put a temporary zinc in place until we get this sorted out, any suggestions on best approach?

Would Galvanic Isolator (that I saw while researching on this forum) help? DEI Marine 50/60A Galvanic Isolator FSP

Thanks in advance,
Jerry