Used to prevent algae build up on or below the surface of the water in your swimming pool Removes existing algae from your pool for clear, clean and healthy water Easy to use with clear instructions written on the bottle for dosage guidance (dosage quantity based on water volume) Designed for use with hot tubs, spas, paddling pools and larger above ground pools This high-quality liquid algaecide is safe to use in your water and is highly effective for long lasting, regular use Will maintain your pool free of most algae for a long period of time and will free you from the problems caused by algae blooms, discoloration and hazes which can affect the appearance of your pool