The Haviland pH Minus is a granular product that is designed to safely lower the pH, and alkalinity levels in your pool water. Regular use of this product will stop and prevent the corrosion of your pool’s surfaces and equipment, while also keeping your water from irritating bather’s skin and eyes when levels get too high. Whenever there is a pH imbalance pool water can get very cloudy, so keeping it balanced will also keep your water clearer. This product is compatible with all systems including bromine, chlorine, mineral sanitizers, and biguanide.