Tetra Whisper® Bio-Bag® Replacement Cartridges Size:Large, 3 ct Because the crate folds

Because the crate folds

Flat steak-house style grids

The pail holds up to two weeks of cat litter (for one cat)

Classic great taste since 1926

Puppies up to 1 year old and pregnant or nursing dogs

Tetra Whisper® Bio-Bag® Replacement Cartridges Size:Large, 3 ct Because the crate foldsFor the ultimate in convenience, choose Assembled Whisper Bio Bag Cartridges. Packages are color coded, making it easier than ever to remember which size to purchase. Fits: Small 3i Internal Medium PF10 Power Filter, 10i Internal and Reptofilter 90 GPH Large 20, 30,40 and 60 Power Filters and 20i & 40i Internals Instructions 1. Rinse Bio Bag under cool tap water to remove carbon dust. 2. Open lid and insert Bio Bag into filter. 3. Replace clogged Bio