Keep the water in your pet's Drinkwell fountain tasting fresh Premium Filters have 6 compartments to evenly distribute charcoal for long-lasting filtration The activated carbon filter should be changed every 2 to 4 weeks. NOTE: this is not the genuine Drinkwell product. Compatible with the following fountains (filter SKU# PAC00-1307) Drinkwell Original Drinkwell Platinum Drinkwell Big Dog Drinkwell Multi-Tier Drinkwell Outdoor Dog Package includes: 1x FilterKeep the water in your pet's Drinkwell fountain tasting fresh Premium Filters have 6 compartments to evenly distribute charcoal for long-lasting filtration The activated carbon filter should be changed every 2 to 4 weeks. NOTE: this is not the genuine Drinkwell product. Compatible with the following fountains (filter SKU# PAC00-1307) Drinkwell Original Drinkwell Platinum Drinkwell Big Dog Drinkwell Multi-Tier Drinkwell Outdoor Dog Package includes: 1x Filter |