Great filtration effect comes from the delicate design. This upgrade water filtration pad ensures both effective filtration and smooth water flowing. Designed with 8 layers of different density filtration material builds up a barrier preventing hazard impurities get into water, quickly build up an effective filtration system for your aquarium tank. Made of durable nano bio sponge filter and fibre bio sponge filter, and then fixed by two layers of ultra high precision cloth, and finally two layers of three-dimensional mesh cloth. High temperature hot melt bonding, Non toxic and safe. Washable, not easy to deform and reusable. Can be used for various filtration system, including wall mounted filter for fish tank, pond filter, aquarium external filter, bottom filter, waterfall style filter, etc. Our aquari