Tetra Whisper Bio-Bag Large Filter Cartridges for Aquariums, 3 Count, Ready to Use, Fits Tetra Whisper Fish Tank Filters 10-30 Gal, 20-40 Gal, PF-20, 30, 40, 60, IQ 20, 30, 45, 60

REPLACEMENT CARBON FILTER: Keeps aquarium water crystal clear – removes odors and discoloration.
CATCHES DEBRIS: Dense, dual-sided mesh filters debris and fish waste.
FITS TETRA WHISPER WATER FILTERS: Color coded to make it simple to remember which replacement cartridge size to purchase.
CONVENIENT: Replacement filter cartridges are fully assembled and ready to use.
USAGE: Change monthly or sooner if needed.
Conveniently Assembled and Ready-to-Use
Like the unassembled, the-Packages are color-coded, making it easier than ever to remember which size to purchase
Easy to Assemble, Easy to Replace
Please read all label information on delivery