Cannot find Source of water in keel

[lovinsailing]

Hoping for some help. Can anyone confirm whether Lagoon 50 keels are sacrificial? My 2008 Lagoon 50 has osmosis damage and during haul out we found a LOT of water in both keels. Drilled holes in the bottom of keels and foul salt water came pouring out.
I can’t find the source of the water getting in. Done the blow and bubble test and can’t find any Source. Cannot see the top of the keels from bilge area because of tanks. Are these keels sacrificial? Any ideas how to find this ? We are in the process of peeling the bottom and the boat has dried out enough to start filling and I still cannot find the source of the water in the keels. I cannot see the top of the keels from inside because of tankage.

[arsenelupiga]

do you keep your bilges powder dry ? If not, that could be source...

[lovinsailing]

The boat was not previously taken great care of, but ... if this is a sacrificial keel - could water enter from the bilge?
Can anyone confirm for me how the Lagoon 50 keels are fitted?