▼ Filters work most effectively when the water is dirty or not changed frequently. To provide your pet with fresh water, change the water regularly and use a cotton pad instead of a filter when cleaning the water dispenser. ▼ 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 10 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. Cordless (filter sponge) for cat automatic water dispenser, 10 pieces ＊Instant purchase welcome, silent purchase at midnight OK ◎ ＊Please contact us before evaluation if there are any problems.ᐟ.ᐟ #Yue's product list is here ✨☜ #Yue's animal goods 7-26 80/1