Product review (5 stars): Necessary For Vicks/Kaz V790 Humidifier
Bought the pads a month ago and just for S&Gs (shiz and grins), I decided to take a look at the pads today - just 1 month later.  The tank water looks clean so I guessed the pads were not needed.  Duh! Holly ships!!!  The pad accummulated more minerals from my tap water than I thought possible.  The tank water looked clean.  I won't pre-soak in vinigar until I know what will happen to the minerals that I now know are in the water.

P.S. I use the pads in a new Vicks/Kaz 2-tank Model V790 Germ-Free Humidifier for Medium/Large Room Size.  It provides pure, sanitized warm mist to the environment.

P.P.S. These pads are NOT filters!  They are meant to absorb minerals from the water and they do that VERY WELL.

GREAT PRODUCT!