Standard Household bleach is about 5.25% Sodium Hypochloride. If you go to a pool supply store (most areas) you can get liquid chlorine that is 10.5% sodium hypochloride. Some areas may not have it but it's everywhere in Florida, ( I used to asst. manage a pool supply store) That would be stronger than using the standard bleach but if you can find Sulfuric Acid, that would be best.