HoMedics Demineralization Cartridge for Ultrasonic Humidifiers – 4-Pack Humidifier Filter Replacements, Filters Mineral Deposits and Purifies Water in Air Humidifiers for Bedroom, Plants, Office

Using a Taotronics humidifier with 300mL/h output and a 4L tank, I placed one cartridge in a 1L beaker of water for 30 minutes. Then I poured the water and cartridge into the empty tank, and turned on the humidifier.In less than one minute, my Dyson air purifier went wild. Within 10 minutes, it registered more than 300 ug/m^3 particles in the air, both PM2.5 and PM10. In a room of 33 m^3.That is what I had measured without the demineralization cartridge. So, this cartridge did nothing at all.The water hardness in Toronto is 124 mg/L, which is just barely "hard". (120mg/L is not considered hard, and there are some towns about 120 km away with a hardness of 600.)I turned the humidifier off after about an hour, and then waited 6 hours. That means that the cartridge had a full 6 hours to demineralize about 700 mL of water.When I turned the humidifier back on after 6 hours, I observed the same result.The manufacturer says that one cartridge is god for 30-40 fillings. Clearly, this cartridge is of no use whatsoever, even when immersed in less than 1L for more than 6 hours, in water that is almost not even "hard".If you are concerned with Calcium Carbonate particles in the air that may cause respiratory problems, this demineralization cartridge is a waste of money. Either use distilled water (which is expensive), or don't use Ultrasonic humidifiers, even though they are efficient and quiet. I'm not so concerned with the white dust that settles on the furniture as I am with what it does to my breathing.Right now the outside air has 16 ug/m^3 , and inside 2 ug/m^3. With the humidifier going, with or without the demineralization cartridge, it would be over 400 ug/m^3 particles.

I saw absolutely no difference in mineral deposit white mist while using this cartridge. It is expensive and does nothing.

I have two humidifiers in my home. These help keep them clean and functioning well.I find that I need to change them about twice a month. The more often you have to fill your tanks, the more often you will probably need to change these out. They say they last about 20 fills.

Horrible. Left all this black residue in the tanks and all over the inside of the humidifier. Took almost 2hrs to get all of it gone. If I only used them sooner i would have returned them in a heart beat. I have switched to using distilled water because I can't trust this things and I'm not spending all this time cleaning.

Don't expect miracles, but if your tap water is not too hard it will reduce white dust deposit in your house. It is not too expensive, so maybe using two pods at the same time can be more effective. But for us one is sufficient.