Made of flexible fiber compounds, this filtration media is used in many applications in the aquaculture and koi pond markets. It is excellent for removing solid wastes and, unlike other filter padding, totally resists compression! The solid fibers are very resistant to sludge build-up and clogging, making cleaning easy. It also features a lot of surface area, so it is very good for biological filtration. Great for low-pressure, gravity- fed filters and skimmers, Matala is positively buoyant and may require anchoring in submersed applications. Sold in 391/2” L x 24” W x 11/2” H sheets only. Ships Oversize.