Unique interlocking heron protection system that floats on the surface of your pond. This ring version is perfect for round and/or small ponds, but if you a large rectangular pond check out the rectangular version. This Netfloat product is less obtrusive than conventional pond netting and can be fitted to any shape fish pond. It works as an efficient deterrent protecting any koi carp or goldfish from heron attack! Netfloat can be cut or left out to allow pond plants such as lilies to grow through and they can easily be removed and replaced for pond maintenance.