Eshopps 4 inch x 300 Micron Filter Sock Category_Coral Nutrition Note from Blue Fish Aquarium:

Note from Blue Fish Aquarium: This lens also works great on freshwater nano fish

Outlet     3/4" MPT

fresh and salt-water aquariums

Flow at 10' - 110 gph

Trapped air auto-evacuated every 12 hours to ensure maximum efficiency

Eshopps 4 inch x 300 Micron Filter Sock Category_Coral Nutrition Note from Blue Fish Aquarium:Filter socks stay hidden out of the way in the sump, but they are a boon for clear aquarium water. Micron filter bags provide excellent mechanical filtration, which helps reduce the amount of ammonia producing organic matter in your aquarium. They also help prevent larger objects such as sand, crabs, and snails from damaging pump motors. Add these Eshopps filter socks effortlessly to any existing sump. Choose from Round or Rectangular Bags;