Product review (1 stars): Fette Filter is Useless and a Waste of Money
The Fette replacement filter is a terrible filter. It does not absorb water when soaked. After soaking, filter is still half dry. After single five (5) hour use of humidifier filter is completely dry.  As bad as the Kaz filter is - and the Kaz is VERY bad - at least it absorbs the water and remains wet after multiple uses. The Fette does not, it is running dry for most the time  the humidifier is on. Do not buy this Fette filter!