1.2X Density Filter Floss for Filtration: Designed for both mechanical and biological filtration, these pads trap debris, excess food, and waste while promoting beneficial bacterial growth—keeping your aquarium water clear and healthy. 2.Flexible Design Fits Any Filter System: The filter pads can be easily cut to size, making them compatible with all types of filtration systems—canister filters, sump systems, hangonback filters, and setups for tanks of all shapes and sizes. 3.Safe for All Aquatic Environments—Fresh Saltwater: Made from durable, nontoxic material, this filter floss is safe for fish, turtles, plants, and coral. Ideal for freshwater aquariums, saltwater tanks, and even garden pond applications. 4.Reusable Washable for EcoFriendly Maintenance: These filter pads can be rinsed and reused multiple times, reducing waste and saving money. Their thick, durable construction withstands repeated cleanings without losing filtration efficiency.