Large Aquarium Filter Cartridges - Compatible with Tetra Whisper Bio-Bag - 8 Pac
Compatibility: Designed to fit Tetra Whisper Bio-Bag IQ20, IQ30, IQ45, and IQ60 power filters, as well as 20i and 40i built-in filters, or PF20, PF30, PF40, and PF60 power filters. Ideal for 10-30/20-40/30-60 gallon aquariums.