CH=130(I had to do a refill(50%drain) to lower CYA and it dropped my CH).
CYA=30(it was 100 before the drain).
My pH has been on the rise since I did the drain. I have had the pool just over two years and never had a problem with the pH. I've had other problems but never with the pH. What is raising my pH? I have been adding acid at least twice a week since the drain. Thank you to all who reply.