There are 4 units left in stock.
Whisper® Bio-Bag® Replacement Cartridges
For 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.
Large Bio-Bag Fits 20, 30,40 and 60 Power Filters and 20i & 40i Internals