Whisper Large (Regular) Bio-Bags

Authentic Whisper Filter Bio-Bag disposable cartridges. Each cartridge consists of a plastic frame that is surrounded with a white filter bag that is filled with activated carbon. The plastic frame is specially designed to increase aerobic bacterial action by up to 200%. The fluffy filter bag is designed to remove larger particles from the aquarium water. The ultra-grade carbon is of the highest quality and will help to move odors and organics from your tank water. Fits Fits the Whisper C, 1, 2, 3, 10-20, 20-40, 20, 30, 40, 60, 20i Internal, 40i Internal, Triad 1000, 2000 and 3000 filter models. Also fits the Top Fin 20, 30, 40, and 60 filters sold exclusively by Petsmart. Each cartridge measures approximately 4-1/2" x 6-1/2".