Super Stain Away can be used on all types of pools for the prevention of stains as well as for pool calcium build up prevention. In fact, with regular usage, Super Stain Away will reduce or even eliminate the incidence of stains and scaling on pool surfaces. For less scrubbing and a beautiful looking pool, Super Stain Away is the perfect solution. For best results, add a maintenance dose every week for continuous protection from stains and scale. Sequestering agents such as Super Stain Away degrade in the presence of sunlight and chlorine.