1. Stop adding chlorine to the pool: The first step is to stop adding chlorine to the pool. This will allow the chlorine levels to start to dissipate.

2. Turn off the chlorinator: If you have a chlorinator, turn it off. This will further prevent chlorine from being added to the pool.

3. Test the pool's chlorine levels: Use a pool test kit to test the chlorine levels in the pool. This will give you an idea of how much chlorine you need to reduce.

4. Add a chemical reducer: There are a number of chemical reducers available that can be added to the pool to reduce chlorine levels. Some common reducing agents include sodium thiosulfate and ascorbic acid. Follow the directions on the product label to add the correct amount of chemical reducer.

5. Circulate the pool water: Once you have added the chemical reducer, circulate the pool water for at least 24 hours. This will help to distribute the reducer throughout the pool and to reduce the chlorine levels evenly.

6. Rinse the pool filter: Rinse the pool filter to remove any remaining chlorine or chemical reducer.

7. Retest the pool's chlorine levels: Retest the pool's chlorine levels to make sure that they are in the desired range. If the levels are still too high, you may need to repeat steps 4-7.

Additional tips for reducing chlorine in a pool:

* Use a pool cover when the pool is not in use. This will help to prevent chlorine from evaporating.

* Maintain the pool's pH levels around 7.2-7.8. High pH levels can cause chlorine to become less effective.

* Avoid using shock treatments or superchlorination unless necessary. These treatments can temporarily increase chlorine levels.

* Consider using a salt water chlorinator or bromine-based sanitizing system as an alternative to chlorine.