* Cover your pond. This is the most effective way to keep foxes out of your pond. You can use a net, chicken wire, or even a tarp. Make sure the cover is secure and there are no gaps that the foxes can get through.
* Put up a fence. A fence can also be an effective way to keep foxes out of your pond. The fence should be at least 6 feet tall and made of a sturdy material, such as wood or metal. Make sure the fence is buried underground at least 1 foot to prevent the foxes from digging under it.
* Remove attractants. Foxes are attracted to food, so it's important to remove any potential food sources from your yard. This includes pet food, bird seed, and garbage. Keep your garbage cans covered and make sure your pet's food bowl is not left outside overnight.
* Install a motion-activated light. Motion-activated lights can scare foxes away. Place the lights around your pond and in any other areas where you've seen foxes.
* Use a fox repellent. There are a number of commercial fox repellents available.
By following these tips, you can help to keep foxes from your fish in a pond.