Eshopps 4 inch x 300 Micron Filter Sock Category_Coral Nutrition 1 x Optical cleaning cloth

1 x Optical cleaning cloth

Comes in separate freshwater and saltwater formulas

and the scale of the immersed hydrometer is read off on according to its immersion depth

Fluval FX4 Canister Filter (A214)

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

Eshopps 4 inch x 300 Micron Filter Sock Category_Coral Nutrition 1 x Optical cleaning clothFilter 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;