Liners Inc. 35507B Clearpond Rd. Specifically raccoons who live in the city, suburbs and in the country. Looking for food to consume, they will turn over the plant containers in your pond and highly upset your fish. The first defense line is to make the sides of the pond almost vertical.
Raccoons find fishing hazardous when the water level is below the pond ledge, out of their reach.
Another way to protect your fish is to place a pile of smooth stones in the pond to create a safe haven where they can hide. Placing screens across the pond at night is a daily chore and very unattractive. A fencing grid placed 6 to 12 inches below the water surface allows fish to dive to safety, out of paws way. After an encounter or two, the raccoon will respect this fence even if the power is off. A dog may keep the raccoon away from the pond.