Hello, I can't get my PH to come down for the last week. Prior to that everything had been perfect. (Although the ph would never go below 7.8)/Then we did the weekly cleaning and shocking and everything went wonky. At first the chlorine would not go down from 10 total chlorine, and free chlorine was high. We drained and added fresh water Stopped adding tablets, and added ph down. Also added oxidizer which brought the chlorine down. But TA and PH were still high. After adding more ph down, the TA is down to 180 but ph is still at 8.4. Total chlorine is now at 5 and free chlorine is 3 for the last 3 days. The weather had been very hot, and now it's down in the 60s. Two days ago also added Clorox 6 n 1., which brought the CYA up to 100 but it has since come down to 50.