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In respect to this, will pool water with chlorine kill plants?

Swimming Pool Water Harms Plants Swimming pool water contains chemicals, especially chlorine, that can harm your trees and landscape plants when water drains and floods the area. Too much chlorine can damage tree leaves and other delicate tissues. Too much chlorinated water all at once can even kill trees.

Similarly, how long can water sit in pool without chlorine? Well, if the question is literally how long does it take water to become unsanitary if there is no sanitizer at all in the pool (i.e. no chlorine, bromine, Baqua/biguanide/PHMB, or even copper/silver or algaecide), then keep in mind that bacteria double in population every 15-60 minutes.

Also, where do you drain your pool water?

Run a hose from your swimming pool to the sanitary sewer access port or your indoor drain. Attach a submersible sump pump to the other end of the hose and place it in the deep end of the pool. Many cities have ordinances dictating the allowable flow rate of the sump pump you use when draining pool water into the sewer.

Can I use my pool water to water my lawn?

Most soils are capable of withstanding chlorine at high acid levels. So your kids splashing water on your lawn as they get in and out of the pool is not a cause for concern. In fact, it is actually recommended to use excess pool water on your grass as an effort to conserve water in your community.