Blue Horizons Algae Controller contains Miristalkonium Chloride and Benzododecinium Chloride, Blue Horizons Algae Controller is designed to be used on a regular basis. Blue Horizons Algae Controller should be used regularly to prevent Algae growth in your swimming pool. Blue Horizons Algae Controller is complementary to most swimming pool sanitisers. Blue Horizons Algae Controller should be used to prevent pool water from turning green. Prevents and treats Algae. Fast acting. Part of the BOAST system. Instructions - Maintain pH level within the ideal range of 7.2?7.6. If not in this range, adjust. - Check the chlorine level and ensure it is established within the ideal range 1 ? 3mg/l (ppm); - Gradually pour the solution in to the pool, whilst the pump(s) are turned ?on? preferably near the water inlets to aid distribution. - After the initial dose this product should be applied once a week to prevent algae formation ### Dose rates | Water Volumes | | | | | --- | --- | ---