Tetra Whisper EX Carbon Large Round Filter Cartridges, 4 Count, Fits Tetra Whisper EX 30, 45, 70 Fish Tank Filters

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