Relax Spa 5kg Chlorine Granules – Stabilised Fast Dissolving for Swimming Pools
To increase the chlorine residual in 1000 litres of water by 1ppm add 2gm of Stabilised Chlorine Granules (e.g. 140gm of Stabilised Chlorine Granules added to 70,000 litres of water will increase the chlorine residual by 1ppm).