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.

Probably some sort of chemical or mineral. Wherre is it places in the
system?

When you say "leak" do you mean some buildup around the fittings or do
you mean a dripping leak?

Need more information. Post a photo someplace.