A fast-dissolving dichlor in granules, its highly stable properties and a 55% concentration of free chlorine make it suitable for treating pool water. Ideal for: Shock treatments in any type of pool or spa. Added value: Due to its fast-dissolving action in water, the right quantity of residual chlorine is quickly obtained. It is more stable against the sun’s ultraviolet rays in comparison with other products. It does not alter the pH of water. Recommended use: Free residual chlorine should be in the range of 1–2 mg/l. Readings are easily obtained using a chlorine and pH test kit.