On Sun, 15 Apr 2012 17:52:55 -0700 (PDT), Alive and Kicking
wrote:

I have water treatment in my house, which includes water softener,
carbon filters and chlorination system. My carbon filter which is
located beside my water softener is leaking some type white crusty
snow like substance around the edges at the top cap area. Does
anyone have a clue what could be causing this?
Thanks.
Derek.

A weak or old O-ring on the filter cap?

Is the filter housing cracked?