For the prevention of metal stains and scale in swimming pools
360 g/l Phosphoric Acid
Chelating agent that prevents stains and removes metals from pool water by sequestering. In case of severe staining, first use Pool Solutions Stain Remover to eliminate existing stains and then Metal Magnet to prevent them returning.
1 kg per 50,000 litres
May be applied in specific spots by using a sock