Pool water is bad for your garden.

Don’t do it. Chlorine and other pool chemicals will damage or kill most plants. Even if your pool is saltwater or low-chlorine, the residual chemicals build up in soil and mess with root function.

If you absolutely have to use pool water (drought, emergency), let it sit in a bucket for 24–48 hours so the chlorine evaporates. But even then, the salt content in saltwater pools is still too high for most plants. You’re better off collecting rainwater or using tap water.

Your plants don’t need a swim. They need clean water. Stick to that.