RedSea DIY Net Cover 180cm / 72"Red Seas Customisable Net Covers prevent the risk of livestock jumping or climbing out of the aquarium without reducing the amount of light penetration to the aquarium or affecting the overall display. With its sleek and minimalist design, Red Seas Net Cover blends in seamlessly, even on ultra clear, rimless, open top aquariums. The net cover is made from extra thin, transparent nylon, which has minimal effect on light penetration into the aquarium.