This is a high quality product from the Champion range of hot tub and spa products. Nobody wants discolouration or cloudiness in their hot tub which is why a dose of Champion Spa Sparkle is recommended to maintain water clarity. Spa Sparkle acts as a floculant, meaning that it collects small particles in the water and joins them together into larger particles, which are then removed by your filter system. Instructions: Add 25ml of Spa Sparkle per 500 litres of hot tub water. Leave filtration pumps running for at least one hour after the dose has been applied. Contains: 2 Litres