Filters are a key part of your pet water fountain – keeping the water in perfect, purified order. At Closer Pets, we recommend replacing your filter every month, so this handy six-pack of pet fountain filters from our range of pet fountain accessories will give you half a year of clean and free-flowing water for your four-legged friends to enjoy. Please note you may receive filters with or without a blue outer casing. Both work in the same way and fit the same products. These replacement polymer-carbon filter cartridges trap dirt, fur, and any other nasties. What’s more, the activated carbon removes chlorine and unpleasant odours from your tap water, therefore improving the taste and even the smell for your pets’ sensitive noses – did you know a dog’s sniffing power can be up to 10,000-100,000 times superior to ours?These pet drinking fountain filters are suitable for soft water, but if you have hard water in your area, our 3-Stage Filter Cartridges will be perfect for you!For use with the below products if you live in a soft-water area:Three-level Two-litre Pet Fountain (CP335) (Ref. CP335)Large Two-level Six-litre Pet Fountain (385) (Ref. 385)Please note you may receive filters with or without a blue outer casing. Both work in the same way and fit the same products.