Feature●The automatic circulating water supply replacement activated carbon filter constantly softens tap water, removing fur, leaving food and dust. It keeps water fresh at all times.●Suitable for pet water supply filter, automatic water supply with brand LED lights.●To keep the water fresh, replace the filter for 2-4 weeks or when visible stains such as fur or hood scum are noticed.●High Performance Activated Carbon & Ion Exchange Resin Absorbs scent and bacteria, removes magnesium and calcium in water, and makes it gentle to cats with reduced hardness (soft water).●Package Includes: 4 x Replacement filters.Description