Best Humidifier for Hard Water Reddit (2026): The “White Dust” Fix
If you have hard water, 90% of humidifiers are useless. You buy a sleek ultrasonic unit, fill it with tap water, and 24 hours later, your entire room is covered in a fine white powder. That’s calcium, and breathing it in is like inhaling chalk dust. The standard advice is “just use distilled water.” But