These O2 tablets destroy bacteria and remove organic impurities. They must be used in conjunction with Aquablanc Active Oxygen Activator Liquid. Initial dose: Add two Aquablanc O2 tablets per 1500 litres of spa water. Before every use: Add one tablet per 1500 litres of spa water. Apply weekly if the spa is not used. Aquablanc O2 tablets should be applied using a floating dispenser. Test the Active Oxygen level one hour after application of the tablets. The level should be 5 – 10 ppm. A weekly application of a chlorine-based shock, such as Splash Spas Spa Shock Express, is recommended for best results.
