Backyard Bliss: How to Clean and Maintain Your Koi Pond in 9 Steps

Note that this part gets a little messy. Have a relocation fish tank filled with water (make sure it’s a safe temperature) and ready for your koi fish. Use the fishing net and remove the koi fish so they’re secure.

Now that the fish are safe and sound, you have to remove the large debris. Just like a pool, you’ll grab your skimmer and remove any large leaves or sticks floating in the pond.

Next up, you’re ready to pump the existing water from the pond. Draining makes it easier to clean the pond’s liner. For this, you’ll need your pond pump. 

The pond pump should be submersible so the water will fully drain. After placing it in the pond, it will suck up the older water and remove debris. In no time, you’ll be left with an empty pond.

After the pond is empty, you’re going to want to let it dry for at least an hour. Once it’s dry, you’re good to start removing parts.

Start by removing faux plants and structures. Then, move on to removing any lights, features, and the pump.

Your koi pond should now be completely dry and empty. Start scrubbing the pond with a light hand. You can use a toothbrush or any other lightly bristled brush. This will get rid of any scum and algae lurking around. 

You can’t use any cleaners since you’ll be placing your koi fish back in the pond. Instead, use the sprayer attachment on your hose along with a brush to clean the pond liner.

Now that the pond is clear, you’re going to add a fish-safe dechlorinator to the pond. Just be sure it’s approved for use in the pond before using the directed amount.

Dechlorinator is done, and now you should get the hose. Use your hose to fill up the koi pond. In no time, your fish will have fresh water.

Last, but arguably, the most exciting step—add your accessories, plants, and fish houses back into your pond. Then, get your relocation tank and fish net to place your koi fish back into the pond. Watch in delight as they enjoy their new, clean home.