Product review (5 stars): BestAir
Living in the desert, a humidifier is almost a necessity in the winter.  I got tired of the nasty pink slime that coated the inside of my humidifier.  After a couple weeks of use, I do not see any slime on the bottom of the humidifier.  It only takes a cap full per gallon, so the bottle will easily last the winter.  I poked two small slits in the foil covering the opening so the fluid can drizzle out without splashing.