Help finding a short story.

[OnePieceLover12]

Okay, there's a particular short story for which I am searching, but I am having some trouble finding it.

Here's a little information that might help:

-It was written by Isaac Asimov.
-It involves a family that cannot get wet lest they turn to sugar.

Any help will be greatly appreciated.

[Yusuke Urameshi]

this is a LONG shot

but does it envolve high school and a guy who is on a swim team?