Whisper Bio-Bag Replacement Cartridges, Small

Whisper® Bio-Bag® Replacement Cartridges Size Small   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       Bio-Bag Size BFA Item # Small 2 Pack TE25900 Small 6 Pack TE19550   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-Bag when there is reduced water flow out of the filter.