A water pipe in the attic of a house we rent broke, resulting in water all over the floor and running out the light fixture. The pipe was repaired, but later we discovered black mold on the ceiling and walls. A couple of days later we bought humidifiers for the rented house and the home we own north of Houston TX. We already had an air purifier that used ozone, but it was not helping out very much, even after putting in some new ozone plates. I went to our home north of Houston, which had been closed for several days. When I went inside, there was an odor that was anything but fresh and clean. I thought I had left something in the trash can that caused the odor, but never found the source that caused it. So I took the new humidifier and filled it with Prill Water and turned it on high. In just 15 minutes, the kitchen, living room and bedroom smelled clean. Then I called my wife who was at the rental house, and found out she had not started the humidifier there. I told her to start the humidifier ASAP; that she would not believe how good it would make the house smell. I called her back in a couple of hours to ask about the odor in the house. She said it was gone and the house smelled clean. A check 24 hours later revealed that there was still no odor of any kind in the house. We knew the Prill Water in the humidifier would not kill the black mold, but we hope it will retard the mold growth and prevent any health problems. After this experience, I hope others have the same results with their humidifiers and Prill Water. I feel every home; office and schoolroom should have a humidifier using Prill Water 24 hours a day. I will be using this equipment from now on.