Product review (2 stars): It's annoying to say the least
The more that I use these refills, and or the filter itself that is already loaded with the granules, the more that I get the feeling that these things don't do a damn thing! For what they cost, I still get the white dust all over the place and I change these things every two weeks, with no results. This will be the last time that I purchase the refills or the filter itself, as my room looks the same with or without this thing, full of white dust and a hazy smoke color that lingers in the sunlight! Also, if you buy this refill kit for your filter case, be ready for your humidifier to shut down due to low water, as these kits cause the filter to plug up, not allowing your tank to completely drain. My humidifier will shut down from the low water alarm, though it still has 1/4 tank full of water in it. This does not happen if I buy the pre filled filters, it only happens when I fill my filter with the granules from this kit. It's annoying to say the least!!