Protec Humidifier Cleaning Fish 1pk Multi Humidifier Cleaner PC1F Antimicrobial Protec Humidifier Cleaning Fish features Aquastat antimicrobial technology to keep your humidifier cleaner for longer. This easy-to-use cartridge kills up to 99% of odor-causing bacteria and prevents the buildup of slime, mold, and algae in the water tank. Simply drop it into the tank for continuous protection that lasts up to 30 days. It contains no harmful chemicals and works in most humidifiers, ensuring a fresh and clean mist for your home environment. Each fish is effective for tanks up to two gallons. Measurements: • Weight: 0.09 oz per fish Before purchasing, please read measurements I photographed to see if there is a size discrepancy. If an item shows a significant difference in size between what the tag says versus what my measurements show, I will list the item based on measurements to ensure a more accurate fit.