The Non Chlorine Shock is a granular product that is ideal for regular oxidation of your spa water. As this does not increase chlorine or bromine levels, bathing can resume shortly after application which makes it a really popular choice amongst other similar products. It is recommended that regularly oxidising the water, ideally weekly, will pay dividends in the prevention of spa water problems. The Non Chlorine Shock dissolves rapidly to break down unpleasant pollutants & organic matter & is effective over a wide range of water conditions & p H values.