Whisper Bio Bag Disposable Filter Cartridges keep your aquarium water crystal clear, help remove odors and discoloration, and are economical and easy to use. Whisper Filter Cartridges provide superior mechanical and chemical filtration for your aquarium. Dense, dual sided mesh catches debris and fish waste. For superior and easy aquarium filtration. For use in Whisper 4 and 5, TetraTec 300 and 500.
Used to buy in box of 12, now only box of 4. Also quality of material is lousy, after I place carbon in and rinse the bag, the bag has holes in it. As with practically everything else quality is lacking.
Whisper X-large bio bags 1/27/2014
Why did they stop selling the 12 packs of the X-large bags. its getting to costly with the 4 pack
Whisper Bio Bags 11/28/2012
Filter bag falls apart when rinsing the carbon. Before I was able to rinse them and use them twice.