How and how much pH minus do you use when alkalinity is 350 in a 6800 gallion pool?

To lower pH in a 6800-gallon pool with an alkalinity of 350 ppm, you would typically use pH minus according to the product's instructions. The amount needed can vary based on the product concentration and pool conditions, so it's best to follow the manufacturer's guidelines for dosage. It's important to test the pH after adding the pH minus and make adjustments as needed to reach the desired range of 7.2-7.6.