New Premium Charcoal Filters for PetSafe Drinkwell Fountains Pack of 10 filters Compatible with Drinkwell Original, Drinkwell Platinium, Drinkwell Big Dog, Drinkwell Multi-Tier, Drinkwell Outdoor Dog, Drinkwell Mini, Drinkwell Zen Keep the water in your pets Drinkwell fountain tasting fresh 6 compartments evenly distribute charcoal for long-lasting filtration Replace filter every 2 to 4 weeks