Pascal, the pickle works simply through osmosis. The hides, if properly salted have left the hide "thirsty" for fluids and the acid is "sucked" into the cells. I keep wondering how a plastic jug filled with water "sinks". The natural boyance of the plastice surrounding a fluid of equal mass would seem to stabilize at some point. I guess just "surrounding" the water would allow the water to be "stacked" on top of the hides. Either way, let'em float.