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.
For best results, change Bio-Bag monthly or sooner, if required.
Fits: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