Tetra Whisper Bio-Bag Cartridge Large

UNASSEMBLED 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 Easy to assemble and easy to replace
USAGE Change monthly or sooner if needed