Do i need to bleach my hair?

You will probably need a bleach to get it lighter. Generally when going from dark to lighter bleach is necessary. Toner is what salons use to insure that your hair doesn't turn a crazy color. It is used to remove unwanted pigment. If go to a salon and have a professional do your hair then Chlorine shouldn't affect it based on the toners and bleaches used. Box color Will most likely turn a green or purple.