Demineralization Cartridge for Ultrasonic Humidifiers, Humidifier Filter Replacements,Prevents Hard Water Build-Up, Filters Mineral Deposits, 20 Count

this item in particular is better in price than buying it from Homedics. you get twice as many for the same price. and it works exactly the same. I know when I don't use these filters when I use my humidifier everything has a white powder to the tops of all my furniture. this stops it from happening. so it seems to me to be better for inhaling. last year I used the Homedics this year I'm using this one which is exactly the same and I'm saving so much money.

I just received these today. Be aware, there are no directions for use nor is there any information on how you are to know when to replace the cartridge. The information on the sale add says 30-40 days? It also doesn't indicate if the cartridge should sit in the water for any amount of time before turning on the humidifier. I didn't wait. Hopefully, that was correct . I will update this review after some use. I'm not sure why reviews are solicited so quickly

This isn't the kind product that you use and whether it's good or not is immediately evident. It works over time. But as the function is basically a simple chemical process I'm just hoping they are manufactured properly. One reviewer noted that there were no instructions, which is true, at least also in my case. But I know from my experience with things like this that they just stay in the water all the time to do their work, even through water changes and additions. I plan to change them once a month. They are small and do not get in the way and are easy to change. I only wish there was a way to "recharge" or recycle them so they didn't end up in a landfill.

good price for the amount of them you get. Haven't had long enough to know how good they might work.

I have 5 humidifiers and these do the job to help with demineralization of the water Highly recommended

I place a cartridge in a gallon jug for 24hrs and use the water to fill my humidifier. No more white dust. Well done 👍

Great filters offered for a terrific price. Stock up now !!

These work wonders in humidifier. Between these and cleaner I'm using, white dust is no more.

Not super sure these work. Still getting white film.

These demineralized my humidifier great! One cartridge per gallon of water is what I use.