JoaSinc 16 Pack Replacement Filters Compatible with Petsafe Premier, Outlast Pumpless, Ion-X & Viva Pet Water Fountain, Activated Carbon Square Filter, Charcoal Filter for Cat and Dog

["Universal Compatibility – Seamlessly compatible with PetSafe Ion-X Cat & Dog Fountain, Outlast Pumpless (60 oz/128 oz), Viva (64 oz/140 oz), Aqua Cube, Aqua Falls, and Current Pet Water Fountain. Precise size: 2.5\" x 2.5\" x 0.2\" for a perfect fit.","3-Stage Advanced Filtration – Multi-layer system combines premium activated carbon, ion exchange resin, and non-woven fabric. Effectively removes bad tastes, odors, heavy metals, debris, pet hair, and food residue—softening tap water for optimal hydration.","Pet-Safe & High-Quality Materials – Made from odorless, non-toxic, and high-quality materials. Improves water quality and helps protect your pet's urinary system health—safe for daily use.","Easy Installation – No tools required. Simply soak the filter in water for 5 minutes, rinse for 30 seconds, then place it into your fountain. Insert the sponge into the pump. Hassle-free DIY replacement.","Regular Replacement for Peak Performance – For consistently clean and safe water, replace the filter every 2 weeks (or 1–2 weeks for multiple pets). Available in value 16-packs to save you time and money on frequent purchases."]