Will putting Chlorine in a pond kill the fish?

Yes, adding chlorine to a pond can be harmful or lethal to fish and other aquatic life. Chlorine is a strong disinfectant that disrupts gill function in fish and can lead to respiratory failure. Even low levels can cause stress, damage, or death to fish and other organisms. If you need to treat pond water, consider using dechlorinators or alternative methods that are safer for aquatic life.