xbbwmrs incomplete. missing 1. xbbwmrs 8-pack large replacement filter cartridges compatible with tetra whisper bio-bag filters large aquarium filter cartridges for whisper 20i/40i iq20/30/45/60 pf20/30/40/60 power filters l-8pack is up for auction in Pet Supplies. This item is in As Is condition. This auction has ended — similar items appear in live auctions regularly.