Photo 1 of 10 Pack Filter Cartridge for Tetra Whisper Bio-Bag Filters, Large Replacement Filter Cartridges for Aquariums Compatible with Tetra Whisper Filters 20i,40i/IQ20,30,45,60/PF20,30,40,60 and ReptoFilter 10 Pack Large

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Photo 1 of 10 Pack Filter Cartridge for Tetra Whisper Bio-Bag Filters, Large Replacement Filter Cartridges for Aquariums Compatible with Tetra Whisper Filters 20i,40i/IQ20,30,45,60/PF20,30,40,60 and ReptoFilter 10 Pack LargePhoto 2 of 10 Pack Filter Cartridge for Tetra Whisper Bio-Bag Filters, Large Replacement Filter Cartridges for Aquariums Compatible with Tetra Whisper Filters 20i,40i/IQ20,30,45,60/PF20,30,40,60 and ReptoFilter 10 Pack Large