Whisper Bio Bags Large 12 Pack 29 55 gallon tank divider Works best with aquarium population

Works best with aquarium population sizes between dense 90 gal to sparse 175 gal

one chemical and two biological stages-for outstanding results

Cartridge is refillable to allow for easy customization of water treatment

Sound Effects

connector complete with sealing rings for hose 16/22 mm

Whisper Bio Bags Large 12 Pack 29 55 gallon tank divider Works best with aquarium populationWhisper Bio Bag Cartridges complete the Whisper Power Filter package for a clean, easy to maintain aquarium. The Whisper Bio Bag multi packs come unassembled and offer economical pricing on larger quantities. Fits: Large 20, 30,40 and 60 Power Filters and 20i & 40i Internals