Scale Stain and Scum Controller is the ultimate pool surface protection for superior scale, stain, and scum control and removal. Synertec® technology protects without phosphates and acids. It removes existing scale buildup on tile and salt cell generators without scrubbing or harsh acid cleaners. Metal stains from iron, copper, and manganese are strongly sequestered to prevent damage. Beautec's® blend utilizes inhibitors, crystal modification and sequestration to prevent and remove mineral scales, deposits, stains, and scum on pool surfaces.