【New & Unopened】 ★ Filter material for turtle keeping that powerfully filters out large dirt and odors ★ Durable coarse mat that is resistant to clogging, firmly captures large dirt ★ Reusable by washing away the large dirt from the coarse mat ★ Premium activated carbon's outstanding adsorption power absorbs the source of cloudiness and odors ★ By using it with Tetra Free Wash, you can remove dirt without touching the filter material