10 Pcs 3″ x 4″ Aquarium Filter Media Bags Small, Mini Fish Tank Media Mesh Fi… on July 22, 2026 July 22, 2026 #359 in Aquarium Filter Accessories. Easy to UseThe aquarium filter bags feature a zipper closure at the opening. Durable and ReusableOur bags are made of tear-resistant, strong, and durable polyester fiber material.