I hope you understand that chlorine is literally a disinfectant that's designed to kill stuff, right? Chlorine doesn't exactly appear naturally in water: humans

I hope you understand that chlorine is literally a disinfectant that's designed to kill stuff, right? Chlorine doesn't exactly appear naturally in water: humans notice when it stinks. We use chlorine to kill lower forms of life. It's only safe when it's in a concentration that won't kill us, nor noticeably harm us. At least with chlorine, they admit that's the goal is disinfection, rather than pretending it's beneficial medicine!