Tetra Whisper Lg 3pk Bio-Bag Filter Cartridge

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.

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