For the ultimate in convenience, choose Assembled Whisper Bio-Bag Cartridges. Like the unassembled, the packages are color-coded, making it easier than ever to remember which size to purchase.
![Marina Bio Carb Cartridge for Slim Filters, 3 pack Marina Bio Carb Cartridge for Slim Filters, 3 pack](https://cdn11.bigcommerce.com/s-ldfio/images/stencil/500x659/products/2142/189747/original__58915.1721660543.jpg?c=2)
For the ultimate in convenience, choose Assembled Whisper Bio-Bag Cartridges. Like the unassembled, the packages are color-coded, making it easier than ever to remember which size to purchase.