What Can You Put in Pools to Kill Frogs?

The rhythmic sound of frogs croaking at night is music to some people's ears, but if your backyard pool is full of frogs, the sound can irk you. If you have a swimming pool or pond, it might not be long before frogs begin to call your backyard home. But if you don't want these loud inhabitants, you can get rid of them through a variety of methods.

Increasing your pool's chlorine content will drive frogs away.


Frogs might begin to swim in your pool if its chlorine content is low. If you don't treat your pool with chlorine on a regular basis, and live in an area with heavy rainfalls, your pool eventually could seem more like a natural water source for frogs. When this is the case, you can add chlorine to your pool. This process is often called "shocking" the pool. The amount of chlorine to add depends on the size of the pool. Once you shock the pool you'll have to stay out of it for a short period, but the extra chlorine will kill some frogs and drive others away.


If you have a backyard wading pool filled with normal tap water, it might be an ideal spot for frogs to gather. If so, add a few cups of saltwater to the pool to make the water too salty for frogs. Because average backyard frogs are attracted to freshwater, the salt will "burn" the frogs in the pool, killing some and making others flee to another watery area.


A pond full of lily pads and other vegetation can make a serene setting in your backyard. But if the area has been taken over by frogs, you can introduce large goldfish or koi fish to the pond. These fish won't kill the frogs directly, but they will eat the tadpoles, preventing the birth of more frogs. Eventually, the frogs will find another source of water to lay their eggs.

Citric Acid

Although its name sounds severe, citric acid typically isn't strong enough to do significant damage to plant growth. As such, it's ideal for adding to ponds or pools in which there are frogs. You can buy citric acid at any garden center. Make a solution of 1.3 pounds of citric acid to 1 gallon of water, then spray the mixture directly onto the frogs, if possible. If not, adding the solution to the water will make it unlivable for the frogs.