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Keep your Humidifier Clean - The humidifier cleaning Ball has excellent cleaning performance, prolongs the life of the humidifier filter and keeps the water clean. The humidifier cleaner can prevent other odors by improving the water quality of the humidifier. | Purifies Water & Eliminates Mineral Build-up - The Cleaning Cartridge helps to reduce the white-dust caused by minerals in hard water.This hard-water dust can contain calcium, lime or magnesium.Reduces up to 99% of odor causing Harmful substances growth, Keeps your humidifiers mist clean and less tank cleaning times. | Easy to Use & Replacement - The size of humidifier tank cleaning ball is 1.18 x 6 inches, just put in the humidifier tank. This humidifier tank cleaning ball contains no harsh chemicals. | Compatible with Most Humidifiers - Works in virtually all humidifiers?including the following types of residential humidifiers and vaporizers?Ultrasonic, Cool Mist (impeller), Warm Mist, Evaporative and Steam Vaporizer. Also works in fish tanks. We recommend using 2 Demineralization Cleaning Ball per tank and changing it every 30 days. | Great Value Package & Good Customer Service - There are 12 Humidifier cleaner ball in the package. Not only are they great for cleaning humidifier & fish tanks, they're also great for giving gifts. If you have any questions about the humidifier cleaner ball, please contact us and we will solve the issue within 24 hours.