Help keep your aquarium crystal clear with the Seapora Filter Floss from Underwater Treasure! This dense filter media uses mechanical filtration to remove fine particulate matter from your tank’s water. You can install this specially designed filter floss in both freshwater and saltwater aquariums， helping prevent obstructions in your tank’s biological media. Plus， it can be cut and shaped to fit any filtration system， including canister filters， hang-on filters and more!