Tadpoles eventually grow into frogs. If you have tadpoles in your swimming pool, this indicates that the water environment of your pool supports life. Tadpoles thrive in environments conducive to egg fertilisation and development. Once the tadpole hatches, it will need these same environmental conditions to become a frog. If you don't want tadpoles hanging out in your pool and you don't want to kill them, you'll need to make it easier to catch them.
Place a screen over the drain of your swimming pole. The screen netting must have small enough holes in it to keep the tadpoles from getting sucked through it.
Drain your swimming pool until only one foot of water remains.
Fill a five gallon bucket with the existing pool water.
Net the tadpoles with a pool leaf-skimming net. Drag the net behind the tadpoles and then scoop them up on top of it.
Hold the net over the five-gallon bucket and then dump the tadpoles into the bucket. Continue netting the remainder of the tadpoles until you can see no more.
Drain the pool the rest of the way.
Refill the pool and keep the water well chlorinated. Tadpoles cannot survive in a well-chlorinated pool.
If you just want to kill the tadpoles, chlorinate the pool and then fish out the dead tadpoles with the leaf-skimming net. You may have to shock the pool with chlorine several times before the tadpoles die. Keep frogs out of your pool by installing a frog fence along the bottom of your pool fence. This fence must be buried six inches deep to keep frogs from digging underneath it. The wire mesh must be no larger than a quarter-inch in diameter to keep sexually mature frogs from entering your pool and laying eggs. If the frogs came from a nearby pond or stream, this fence will help keep them out of your pool. Some frogs can climb trees and so if you have a tree over your pool, it's possible the frogs leapt from the tree. You may need to remove the tree to keep the frogs out.
Do not use pesticides to remove tadpoles. These can harm the people who use the pool.