Keep your aquarium free from harmful bacteria and contaminants with these SHIPPED NEXT BUSINESS DAY OPEN BOX Tetra Whisper BIO-Bag Filter Cartridges. Designed for tanks up to 10 gallons, these cartridges are perfect for medium-sized aquariums. The package includes 4 cartridges, ensuring that you have enough filters to keep your tank clean and healthy.

Featuring a unique bio-bag design, these filters are perfect for removing waste and excess food from your tank without compromising on performance. With the Tetra brand, you can trust that these filter cartridges are made with high-quality materials and will provide reliable filtration for your aquarium.