Features:

• Fits all Air-o-Swiss Ultrasonic appliances.

Editorial Review:

Replacement 7531 De-Mineralization Cartridge 7531, For Air-O-Swiss Ultrasonic Humidifiers, Easy To Replace, Prevents Development Of White Dust, MAP PrP Price $12.50.

Customer Reviews:

Avg. Customer Rating: 4.5 / 5.0

works well:

pricey, but if you own the humidifier you have to get the replacement cartidge without it the mist does not feel the same.

Best to buy pre packed:

Buy this item and not the beads separate. It is almost impossible to pack the beads yourself,

Filter for hard water:

Still allows some dust deposits. Live in AZ and don't have water softener. Need to change more often than recommended.

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