Dymax Filter Media Bags are useful for zipping up loose filter media, sealing the bag and inserting the bag inside the filter. It makes changing the filter so much easier - all you do is remove the bag, unzip and replace the filter media inside. The bags are durable and stretchable with a non-corrosize plastic zipper. These Dymax Filter Bags are made from washable nylon net material - easy to clean and reuse again and again. Suitable for freshwater and marine aquarium. Fine bags are a softer nylon with smaller holes.

Dymax Filter Bag Fine Small