Tetra Carbon Filters for Aquariums, Fits Whisper EX Filters, Cleans Aquarium Water, 4 Count

Tetra - Whisper Filter Cartridge Large 4 PackTetra's New EX Filter Cartridges provide both mechanical and chemical cleaning of your aquarium's water. Includes new Timestrip Technology. Improved biological performance with Multi-Density Floss Continuous flush performance Round, modern design Replacement cartridge for Whisper EX30, EX45 and EX70 Power Filters New Timestrips included with each filter cartridge