Bought a new 350-gallon hot tub about 2 months ago. Dealer set me up with Brilliance chemicals. I am using bromo tabs in a floater and keeping it 4-6ppm and adding oxidizer twice a week. TA drops due to bromo tabs but I keep it 60-100ppm. I raised my CH to 250ppm. My issue is my PH will rise to 8.0+ every day. I will add 3 teaspoons full of ph decreaser every day to drop my ph to 7.5. Water is crystal clear and Odor free. I have an ozonator that runs twice a day. We were using the tub everyday but lately maybe once a week. So not getting lots of use. Do I need to change my levels to try and keep the ph down? Any help would be greatly appreciated.