Product review (4 stars): I think this filter is pretty average in it's life expectancy
For an extended life humidifier wick it has performed acceptably. We have hard water but I try to balance that out with water treatment additive. I think this filter is pretty average in it's life expectancy. I've bounced around between brands and I've found some have a very disappointing life before they no longer are effective. Some expensive ones last longer. Then the rest are just average. This one meets my requirements of lasting several months before replacement. It seems to hold it's shape well enough and it still has some absorbancy left.