Product review (5 stars): The one without it stopped working from hard water buildup and needed a good cleaning to get it going again
Expensive but worth it for me. I have very hard water and two humidifiers. One I put this in and the other I didn't. The one without it stopped working from hard water buildup and needed a good cleaning to get it going again. No problem at all with the one I used this in. When I add up the cost of distilled water for 3 months, not to mention lugging all that water home and up to my bedroom, I opt for this little gadget.