Removes Dissolved Metals From Pool Water. Helps Prevent Staining Of Pool Lining. Powafix Pool Acid Keeps Your Pool Crystal Clear And Lowers Ph And Alkalinity. DIRECTIONS FOR USE: If Ph. is 7.8 or higher, dilute 2 to 3 cups acid with water in a 5 litre plastic bucket. Pour solution into the pool. Test Ph. again after 3 ? 4 hours with the pump running and add same quantity if necessary until ph. is correct. USAGE AND STORAGE PRECAUTIONS: Do not mix the product with any other chemicals. Store product separates from alkalis and segregate from oxidizing materials.This product is acid-based and highly corrosive. Ensure cap is tightly sealed and packaging is secure and upright at all times. Store product in cool, well-ventilated area. Secure product when transporting to prevent accidental spillage. Dispose of empty container-do not use for any other purpose. Do not dispose product into a common waste system.Contact 0860 254 620 for product disposal enquiries. Hydrochloric acid 20-30%.