To protect the liner in your koi pond from UV exposure, it's important to cover or shield it wherever possible. Direct sunlight can degrade exposed liner material over time, especially in liners like PVC, which are more sensitive to UV damage. One effective way to prevent this is by covering the liner edges with rocks, coping stones, or soil to block sunlight and keep the material from drying out and cracking.
Around the perimeter, vegetation such as low-growing plants or ornamental grasses can also help shade the liner and create a more natural look. In the water itself, the liner is usually safe from UV rays because sunlight doesn’t penetrate deeply enough to cause harm below the surface. Still, avoiding excessive liner exposure at the waterline is a good long-term practice. Proper installation and thoughtful landscaping can greatly extend the life of the liner by reducing the amount of sunlight it absorbs.
