〚WESWAG Automatic Water Fountain Filter Sponge for Cats - Set of 10〛 ✦ Filters work most effectively when the water is dirty or not changed frequently. To provide your pet with fresh water, please change the water regularly and use our cotton pads instead of the filter when cleaning the water dispenser. ✦ The non-woven fabric adsorbs hairballs and particles, preventing them from entering the water tank. Activated carbon and ion exchange resin can remove contaminants. The resin can also purify the water and remove harmful metals. ✦ Can be used for several months with one pack Usually, the filter is replaced once or twice a month. According to this, a pack of 12 filters can be used for six months to a year. If you have pets that drink a lot of water or if multiple pets share a water dispenser, you will need to replace the filter more frequently. …………………………………………………………………… I carefully check the product condition, but there may be oversights. Please forgive me <(_ _*)> Stored at home and shipped with simple packaging. Thank you for your understanding. ※ Immediate purchase is OK, but I am also selling on another app, so I will prioritize the one that sells first. ※ Please read the profile before purchasing. ※ Returns and exchanges are not accepted due to differences in image, as product images are provided. I am also selling other items #chocorem's listing page Seller management 7-5, 8-14