Best Humidifier for hard water

LEVOIT Humidifier for Bedroom, 2.5L Top Fill Cool Mist Air Humidifiers for Baby Nursery, Plants, Small Ultrasonic Humidifier, Auto Shut-off, BPA Free, Quiet, Knob Control, 360° Nozzle

LEVOIT Humidifiers For Bedroom Large Room Home, 6L Top Fill Warm and Cool Mist for Whole House, Smart Wifi Alexa Control, Customized Humidity, Essential Oil, Sleep Mode, Timer, White,1.58 gallons

LEVOIT Humidifiers for Bedroom Large Room, 3L Cool Mist Top Fill Oil Diffuser for Baby Nursery and Plants, 360 Degree Nozzle, Quiet Rapid Ultrasonic Humidification for Home Whole House, White

Levoit Humidifier for Bedroom, Cool Mist Humidifiers for Plants, 6L Top Fill Air Humidifier for Large Room, Essential Oil Tray, Smart Control, Work with Alexa, Auto Mode, Night Light

Pure Enrichment MistAire Studio Ultrasonic Cool Mist Humidifier for Small Rooms - Portable Humidifying Unit Ideal for Office with High and Low Mist Settings, Optional Night Light and Auto Shut-Off

Vicks V4600-CAN Filter-Free Ultrasonic Cool Mist Humidifier, Medium Room Humidifier for Baby, Bedroom, Office Desk, with Variable Output Control, Dual Scent Pad Slots, Auto Shut-Off, 4.5L/1.2Gal

Vornado HU1-0045-65 Evap40 4-Gallon Evaporative Humidifier

Pure Enrichment® MistAire™ Ultrasonic Cool Mist Humidifier - Premium Unit Lasts Up to 25 Hours with Whisper-Quiet Operation, Automatic Shut-Off, Night Light Function, and BPA-Free

Honeywell HEV355C QuietCare Cool Moisture Humidifier, White, with Break Resistant, Easy to Fill & Clean Water Tank, Quiet Invisible Moisture

Pure Enrichment MistAire Travel - Ultrasonic Cool Mist Water Bottle Humidifier with Auto Shut-Off, Mood Light, Fold-Out Leg, and Storage Bag for Portable Use at Home, Office, Hotel, and More