Photo 1 of PetSafe Ion-X Cat and Dog Fountain Filters, 4-Pack, Dual Filtration for Cleaner Water, Replacement Filter for PetSafe Outlast Pumpless and Viva Pet Water Fountains

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Photo 1 of PetSafe Ion-X Cat and Dog Fountain Filters, 4-Pack, Dual Filtration for Cleaner Water, Replacement Filter for PetSafe Outlast Pumpless and Viva Pet Water FountainsPhoto 2 of PetSafe Ion-X Cat and Dog Fountain Filters, 4-Pack, Dual Filtration for Cleaner Water, Replacement Filter for PetSafe Outlast Pumpless and Viva Pet Water Fountains