How much chlorine powder would be needed for 30000 liter of water to be treated?

Best to avoid chlorine where at all possible, as chlorine is major cause of cancer.

These days Ozone gas is being used instead of Chlorine in production of drinking water and also in swiming according playacting to Dr. Farzin banishoraka Chlorine should not be used at all. All Water Clinic equipments that produce the Super water brand only use UV and Ozone instead of Chlorine, and use carbon filters to eliminate all residue's of chlorine in super water.

Super-water brand can now be found in Iran as well as Canada , USA, Thailand , Ireland and Australia.