Photo 1 of 16-Pack Large Replacement Filter Cartridges for Tetra Whisper Bio-Bag Filters Large Aaquarium Filter Cartridges for Tetra 20i/40i /IQ20/30/45/60 PF20/30/40/60 Power Filters - Ready to Use

Double tap image to zoom

Photo 1 of 16-Pack Large Replacement Filter Cartridges for Tetra Whisper Bio-Bag Filters Large Aaquarium Filter Cartridges for Tetra 20i/40i /IQ20/30/45/60 PF20/30/40/60 Power Filters - Ready to Use Photo 2 of 16-Pack Large Replacement Filter Cartridges for Tetra Whisper Bio-Bag Filters Large Aaquarium Filter Cartridges for Tetra 20i/40i /IQ20/30/45/60 PF20/30/40/60 Power Filters - Ready to Use Photo 3 of 16-Pack Large Replacement Filter Cartridges for Tetra Whisper Bio-Bag Filters Large Aaquarium Filter Cartridges for Tetra 20i/40i /IQ20/30/45/60 PF20/30/40/60 Power Filters - Ready to Use