Florida water always has a smell. You can smell it on the dark rides too. Part of the magic
The discussion of the ride water smell comes up every so often. It's actually bromine that they use because it's easier on the skin and olfactory system. And when you're treating an enclosed area like Pirates that has both guests and employees in those areas all day, you have to consider the safety factor. It's a great smell because it does remind you of being at Disney.