TuffChem PRO Series ORP and pH controllers constantly monitor your swimming pool water regardless of bather load and pool usage. Whether or not you have a small courtyard swimming pool or large backyard oasis, TuffChem will continually monitor your swimming pool water dosing the required amount of acid and chlorine to perfectly balance your swimming pool water. Perfectly balanced pool water, every time, minimising the amount of chemicals your pool requires without constant fluctuation resulting in chemical imbalance.