What do you do if your swimming pool has too much chlorine?

Lowering Chlorine Levels

There is a product called "After Shock-Chlorine Reducer" by Jack's Magic. This will quickly lower the chlorine level in your pool. Please refer to manufacture for instructions on how to use with your swimming pool. Hope this helps!!

ANSWER

While using Jack's Magic will work, it's mainly a marketing ploy to make you think you need a lot of special pool chemicals. Here's a cheaper method:

Stop adding chlorine, and let the sun burn out the excess.