Product review (1 stars): a filter should last longer than 1 week
I was excited to try these filters from FilterBuy, as I've heard so many good things about this company.  I have bought filters from Amazon before, and always had positive experiences.  But I am so disappointed with these filters.  The first one that I put into my humidifier worked great for a few days.  Then water stopped cycling through the unit.  I spent a few weeks swapping tanks & trying to figure out if the problem was with the unit itself or user error.  I was mad because a filter should last much longer than 1 month, but I finally gave up & installed the 2nd filter.  Less than 1 week later, water stopped cycling through the unit again.  The filter is already so gunked up, which I know is preventing the unit from working.  I use a solution to prevent bacteria & scale build up, and have never had this problem with any other filters.  Sadly, I won't be buying these filters from FilterBuy again.  They should last more than a few days.