General description This AlwaysH 6 Pack Automatic Cat Fountain Filter is designed for use with various water fountains, providing a dual action filtration system that combines ion exchange resin and activated carbon to efficiently filter dirt and impurities, ensuring your pets have access to fresh and clean drinking water. Technical specifications Type: Dual action filter Material: Resin and activated carbon Usage Rinse the filter with water before use. Rinse the filter every 2-4 weeks to maintain water freshness. Other information This filter helps remove heavy metal elements and reduces water quality issues, promoting a healthier drinking environment for your pets.