Pondguard is a system of interlocking floating net rings designed to protect your pond and fish from predators such as herons and cats without being an eyesore pondguard is designed to protect the perimeter of your pond as this is where the usual predators strike from leaving the centre open r r easy to remove for cleaning its virtually invisible from just a few meters away and each piece interlocks in seconds to fit any shape pondr r contains 30 x hexagonal net rings measuring 30 x