Product review (4 stars): Almost Perfect
I love my Ventasonic Humidifier and this is the recommended replacement filter for use in it.  There still remains a very fine and slight powdering of minerals distributed on the surfaces of the apartment furniture and electronics, including the T.V.  This can still be annoying but no where near as much of a hassle as dealing with the mineralization when the filter is worn down or is absent.  Since this is the only product recommended, I will continue to use it, even though it is not perfect.