Rapid Action Filter Cleanse is a fast acting filter cleaner, working in less than 1 hour. Traditional filter cleaners require 12 - 24 hours to do their job. The unique formulation allows filter cleaning to be done in a fraction of the time, making this a much easier job to perform regularly. Formulated with Hydrogen Peroxide and powerful cleansers and degreasers, it can be used with sand, cartridge and DE filters. A clean filter media filters better while requiring less frequent backwashing or rinsing. Clearer water and less work. A perfect combination.