ITEM NAME:Carbon Replacement Filter For Pet Fountains, Pet Water Dispenser Replacemen B4I7 Carbon Replacement Filter For Pet Fountains, Pet Water Dispenser Replacemen B4I7 Cat fountain replacement filter with activated charcoal and ion exchange designed can help to remove chlorine, odor and organic contaminants from water. keep the water tasting fresh. Pack of 4 premium activated carbon filters made of premium activated carbon + cotton, size: 4.9*4.9inch. Replacement water fountain filters compatible with cat flower fountains (Not fit catit fountain). Frequency of replacement: 1 to 2 weeks in summer; 2 to 4 weeks in winter. Kindly note: Please rinse filter with water thoroughly before use. Premium Cotton Activated Carbon Pet Water Filter Keeps the water clear and tasty, encourages your cat and dog to drink more to stay healthy Replace more frequently with multiple pets using the fountain, rinse filter with water thoroughly before use A small amount of carbon dust may be released for the life of filter which is not harmful to your pet Fits for: Cat Fountain Color: White Package included: 4 x Carbon Replacement Filters