Instructions
Prevent Rocks from Becoming Dirty
Line your pond with smooth gravel, which acts as a biological filter to trap and break down waste. When you use a base of gravel in your koi pond, your larger decorative rocks stay cleaner and your entire pond stays healthier.
Include plants like watercress, water lilies and water hyacinths in your koi pond to keep organic waste matter down.
Install a mechanical air filter and skimmer with a pump to keep the water as clean as possible. For aesthetic appeal, you can install a waterfall in conjunction with your mechanical filter.
Skim out larger debris by hand on a regular basis, especially in the fall and spring when you're likely to find large amounts of leaves in your pond. If you don't remove them regularly, decaying leaves and other organic matter cause a heavy film on the rocks.
Clean the Rocks
Use a bottom drain and filter to clean the gravel. You can use the filter continuously or when organic matter builds up on your gravel.
Scrub larger, decorative rocks by hand with a regular scouring brush. Only use plain water from the pond if you need to rinse rocks that rise out of the water. Otherwise, you might damage the water quality.
Pressure wash rocks if they become stained and unsightly or just use your hose with a nozzle attachment. You should remove the rocks from your koi pond if you need to pressure wash them.
How to Clean Koi Pond Rocks
Rock elements create a more natural-looking koi pond and can help you blend your pond into your landscaping. Constructing your pond successfully and maintaining it regularly may mean that you never have to clear your pond rocks. When rocks in a well-designed koi pond need cleaning, the job is relatively simple.