How to Keep Frogs Out of Koi Ponds {3 Best Methods}

Does it feel draining to deal with pesky frogs in your koi pond? Do you want to know a reliable way how to keep frogs out of koi pond?

Is there any other remedy besides draining the entire pond?

It’s time to find out the truth and tackle this issue once and for all.

How to Keep Frogs Out of Koi Ponds

How To Keep Frogs Out of Koi Pond

Below are three methods that I use to keep frog out of my koi pond

1. Eliminate Frogs Food Source

Let’s look at the most popular advice first. Drain the pond. Frogs love eating the larvae of bugs that call the pond their home. Eliminating the food source by drying out the pond leaves frogs hungry and in search of another home.

Ponds provide a wet, cool environment for a comfortable frog life. Take away that comfort and watch them hop away. Try draining the pond for a couple of weeks and see for yourself.

2. Reduce Bright Lights

Ponds can be beautiful additions to gardens and backyards. Usually a light source shines in or around the pond to highlight its beauty. Frogs are also drawn to the light as they find the bugs and larvae to be a great reward.

Eliminating the light source may keep the bugs away. When the food source dwindles, so do their predators. This means that frogs may have to find another place to feast.

3. Add Barriers

Think about barriers. Walls, fences and rocks surrounding the pond will make it harder from frogs to jump into ponds. Frogs don’t jump that high, so there’s no need to build giant structures.

Frogs also won’t like shallow ponds that make them more visible to predators. If the pond contains rocks that elevate the floor, frogs may consider it too risky to stick around.

Are Frogs Good or Bad for Ponds?

Do you like insects? If your answer is no, then consider the benefit of frogs hanging around the pond. They’ll eat those pesky critters and annoying flies.

Imagine a nice outdoor meal next to your pond. Then you start shooing away those flies landing on your meal. Frogs may help prevent that from happening.

When frogs multiply and become a nuisance, you’ll hear it. The sound may become too much to handle. They can also eat too many juvenile fish (fish fingerlings) or attract snakes. Frogs contribute to a healthy ecosystem, but finding the right balance is a must.

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Are Frogs Bad for Koi Ponds?

Frogs don’t have teeth and koi fish are too big for them to swallow whole. They usually coexist and koi fish also do not prefer eating frogs. There are instances of koi fish eating frog eggs, tadpoles or smaller sized frogs.

A balanced ecosystem also means that the pond will not be overrun with pests or bugs that could make koi fish sick. Frogs will eat them before any harm comes to the koi fish.

Do Koi Fish Eat Frogs and Frog Eggs?

Are you ready for something gross? There are reports of koi fish sucking out the insides of frogs and leaving their skin to float around the top of the pond.

Koi fish will most likely eat algae, but they are omnivores. They are also opportunistic, meaning that they’ll eat whatever fits into their mouth. They stir up the bottom of the pond and look for worms and insects as well.

If a koi fish spots frogs that are small enough to fit into their mouth, they’ll eat them. Some worry that frog skins are toxic, but they don’t seem to harm koi fish.

What Do Frogs Hate the Most?

Frogs will definitely hate it if the pond is dry. They will also go hungry if there is nothing to feed on. Everyone hates being hungry! Here are some practical solutions that frogs will absolutely hate:

  • Vinegar
  • Coffee grounds
  • Salt
  • Bleach
  • Citric acid
  • Peppermint oil

All of these remedies to repel frogs must be handled with care. It’s recommended to use a spray bottle and make a solution with equal parts water.

Coffee grounds can be sprinkled without water. Peppermint oil and Citric acid solutions should include two or three times as much water. Be careful with bleach. Always wear gloves.

Salt dehydrates a frog and vinegar creates a burning sensation on their feet, much like bleach. It’s best to avoid the bleach remedy and choose more humane approaches in this list.

What Eats Frogs in a Pond?

The list is long and plentiful. Frogs are enjoyed by birds, wildlife and even domestic animals. Let’s check out the list of usual suspects below:

  • Herons
  • Snakes
  • Lizards
  • Water shrews
  • Rats
  • Otters
  • Gulls
  • Crows
  • Foxes
  • Domestic cats

Sometimes we may notice that the frog population has diminished or disappeared. This may not be because they have been eaten. Frogs may have moved on with the seasons or their breeding stage has ended.

Can You Have Too Many Frogs in a Pond?

Frogs have a lot of predators. Tadpoles have it rough. From koi fish down to goldfish, frog spawns are likely to be consumed in mass numbers. Luckily for their population, frogs love to breed.

The main issue for people is the noise. Some may consider the sound to be soothing on a serene summer night, while others may despise the nuisance. The noise level only rises with more frogs in a pond.

Frogs can overpopulate a pond if there aren’t enough fish to balance them out. More fish means  a lower likelihood that the eggs or tadpoles will survive and grow into croaking adult frogs.

How to Stop Frogs Croaking in Pond

Frogs that are croaking in your pond are annoying and bothersome. If you would like some ways to repel or scare them you can try some of the following tips below:

  • using decoys
  • loud noises
  • citric acid
  • saltwater
  • vinegar

Loud noises and decoys frighten frogs. We have a large owl sculpture next to our pond that helps deter frogs. Loud noises can include turning on the radio and keeping it on while you are away to deter frogs.

Lemon juice, vinegar or water mixed with salt will keep frogs out of your pond. Sometimes, the only way to stop them from croaking is to repel them altogether. Spray these scents around the perimeter of your pond and frogs will not enter.

How to Stop Frogs Getting in Your Koi Pond

There are a number of methods to stop frogs from entering koi ponds.

  1. A flow of water through a waterfall or fountain helps deter frogs who like still or standing water instead.
  2. Keep the rest of your pond’s perimeter dry.
  3. Use vinegar, salt, coffee, lemons and sprinkle or spray them around the border of your pond. Frogs hate these scents.
  4. Install fencing around the pond.

Our favorite and easiest method is to make a vinegar mixture with water as a frog repellent. Equal parts vinegar and water into a spray bottle is the easiest way to keep frogs away.

All you have to do is spray around the perimeter of your pond and all of your garden because vinegar is non-toxic. Your plants will not be bothered, but frogs will hate it.

Why Have the Frogs Disappeared from my Pond?

A common reason for frogs disappearing is the loss of their habitat. Their homes could be destroyed from construction, natural disasters or the overpopulation of their natural predators. Too many large sized birds for example, could lead to frogs getting eaten.

Frogs may also try to escape a pond that used to be comfortable. The addition of too many fish or even climate change could result in shrinking populations. Pollution, pesticides or repellants may also be the culprits.

If the vegetation doesn’t support the spawning of tadpoles, the balance of the ecosystem may also be out of whack. Maintaining the balance also requires noticing if the plants are flourishing or declining.

Can Frogs Live in a Garden Without a Pond?

Yes! Adult frogs actually enjoy spending most of their time out of the pond. The pond serves as a breeding spot and a place to cool down. If the frogs are not breeding and the climate is comfortable, the pond isn’t necessary.

Piles of logs or a compost heap will also suffice as potential homes for a season or longer. Frogs may hop out of nearby water sources and return to your garden even if there isn’t a pond.

A light that shines in the garden will attract bugs. Then the frogs show up. If you want to invite the frogs over for dinner, then shine a light!

Also consider adding a bunch of empty pots that collect rainwater if you don’t have a pond. Leave them near a shady area and this will also invite some frogs over to your garden.

It’s a give and take balance to play with a frog population. Adding sand, salt or coffee grounds to areas where you don’t want frogs will be a part of the game. If you want more frogs, add more logs, compost and pots of water.

The choice is yours to make!

Do Frogs Stay in Pond All Year?

The short answer is no. Frogs like to return to the same pond in the spring where they spawned and grew up. Winters are a little more tricky. Frogs like to hibernate and they’re good at it.

Did you know that a frog’s heart can stop beating and their lungs can stop functioning as they hibernate? They could do this under ice, in burrows or cavities in the ground for the winter season.

If the climate is warm throughout the year, frogs may live in the pond for most of their lives. Sometimes frogs leave for 2-3 years after they’ve grown up. They could return when they’re ready for breeding.


The most important takeaway here is to help balance nature’s wonderful ecosystem. The natural world was here long before us, but humans have taken over most of it.

We can do our part by balancing out vegetation, wildlife and even our domesticated animals in our gardens.

It could feel like a stacking or balancing game. We add or take away and make sure it doesn’t topple over or degrade. We want a flourishing garden, but we don’t want too many pests, insects or disturbing noises.

We may love nature, but we also love our homes and properties for the comforts they provide us. We can coexist with frogs, koi fish and plenty of wildlife in a peaceful and balanced way.

Enjoy the gentle sounds of frogs croaking and help them out if you like. They can live part of their lives in your garden with or without a pond.

If you don’t want too many of them hanging around, add more fish to your pond or use humane methods of repelling them.

This is the beauty of our ecosystems and Mother Nature. Let’s be grateful to participate in it. Happy croaking!


Hello, I'm Jason. I'm the guy behind I volunteer at my local fish shop and I created this site to offer tips and advice on the fish I care for.