Water Fountain Filter, LOCPETK Pet Fountain Filter Replacement for Drinkwell, 12PCS Petsafe Filters Compatible With Original, Platinum, Multi-Tier, Outdoor Dog, Mini, Everflow, Zen Fountain. 3. $1999 ($1.67/Count) Save 5% with coupon. FREE delivery Mon, Aug 28 on $25 of items shipped by Amazon.