On Mon, 21 Dec 2015 18:51:29 -0700, Tony Hwang wrote:

Like toilet bowl water swirls.

A toilet bowl is too small to show the Coriolis effect, but a pool isn't
according to Sandlin and Muller.

http://mashable.com/2015/06/04/water.../#vRjaqfm0bSqs
"Derek Muller and Destin Sandlin, the minds behind the Veritasium and
Smarter Every Day YouTube channels, respectively, do show that water
(and even hurricanes or cycloness) preferentially spins counter-clockwise
in the north and clockwise in the south, you just might not be able to
see it with your toilet water."