- Install an electrical deterrent, such as motion-detected water sprays or alarm bells. These may startle the raccoons away from your pond. These are temporary solutions, however; the raccoons will catch on to the fact that the deterrents are just warnings unless there are other preventative methods in place.
- Add cinder blocks, upside-down plastic crates or other obstacles under which fish can hide. Raccoons will only pursue the fish in your pond if they perceive the fish as an easy meal. If the fish can hide and are too hard to catch, the raccoon will soon give up on your pond.
- Expand your pond to make it deeper, so that fish can dive out of the raccoon's reach. The raccoon will not attack the fish if it will make him vulnerable and unable to escape quickly in the event of a threat.
- Cover the pond with 1 in. mesh chicken wire or another similar firm covering. Make sure the openings in the cover are small enough so that the raccoon cannot reach in or fall through.
- Spray repellent around your pond's perimeter. These strong-smelling sprays will not harm grass but will deter the raccoons from approaching. Apply a new layer of repellent after each rainfall.
- Raccoons are most active at night. You can remove your pond's cover during the day to allow for better appearance, but make sure it is covered at night.
- Keep your lawn healthy to avoid infestations of worms and grubs; raccoons love to dine on these bugs, and will be more likely to enter your yard and have better access to your pond.
- Consider electronic fences as raccoon deterrents, but only if these fences will not serve as threats to pets to children.
- Find materials to protect your pond at garden centers, nurseries and hardware or home-improvement stores.