Pond Cover Net 4 x 12 Metres is a lightweight, durable nylon or polyethylene mesh net designed to cover fish ponds and aquaculture tanks to protect fish from predatory birds, snakes, rodents and other animals that cause significant stock losses on Nigerian fish farms. Easy to install over any rectangular pond, this 4 x 12 metre net provides complete top coverage for standard commercial fish ponds, keeping your fish safe from external threats while allowing adequate air circulation, light and rain access to the pond below.