Whisper Bio Bag Disposable Filter Cartridges Pet Supply. Pet Supply » All Pet Products » Tropical Fish » Ponds » Accessories » Equipment » Filter » Filter Carbon Filter • Filter Sleeves Filter • Filter Resins Filter • Foam Inserts Filter • Filter Pads Filter • Filter Cartridges Whisper Bio-Bag Disposable Filter Cartridges buy bestselling pet products, supply find reviews, ratings, prices List Price: $18.62 You Save: $0 Features • junior • 12-pack [ + Zoom ]   [ Buy Now ] Pet Products : Usually ships in 1-2 business days Whisper Bio-Bag Disposable Filter Cartridges Customer Reviews   1     2     3   ♥♥♥♥♥ Easiest filter change EVER. These cartridges are hands down the easiest to change out of every type I've tried so far. Cheap and effective, buy the filter if you don't already have it!   1     2     3   Non User