Pondh2o Pond Cover Nets are made of a strong Black woven mono nylon material, will not rip easily and will last more than one season, extremely good value pond netting. Black UV stabilized rot proof and extremely strong material and comes complete with fixing stakes! Will cover all types of fishponds, water gardens and water features. Extremely good value and our most popular pond netting. Used best if applied at the start of fall to catch all the leaves on the pond and removed in the spring. Mesh is approximately 1/2 inch spacing. Keep your pond clean and your koi fish safe. Pond Cover Nets protect your pond fish from predators like herons, cats, foxes and raccoons. Pond Maintenance is easier with these multi-purpose nets, prevents debris from entering your pond and clouding your water.