The water was clear. The Captain held the glass aloft for the crew to see. So far, so good. The riotous lot seemed somewhat calmed by the sight. It was purely a temporary respite.
"Aye, for sure it *looks* clean," said one of the braver sailors. "But I can't merely believe that won't poison us all just like what was in the barrels before. And, beggin' your pardon, we can't be drinking no seawater, no matter what fancy magic you do to it."
The Captain sighed. The two sailors lost to the poisoned water had caused an uprising, it seemed...