After fighting high CYA for a long, I was finally able to lower it by partial drain/refill (tried bio active, but it didn't work). Now I moving on to PH.
The problem I am having, and that I have noticed since I have owned this pool (a little over a year), is that the PH always rises, no matter what. Whether it's sunny or it rains, the PH will go from 7.2/7.3 to 8 in about a week. Every week.
Is this normal, not normal?
Is there anything that I need to be looking for in the pool itself?
These are my latest test results:
Free Chlorine 6.5
Combined Chlorine 0
Total Alkalinity 50
Calcium Hardness 225
Cyanuric Acid 30
* I use DRY ACID to lower the PH