Total Hardness:500
Total Chlorine:0
Free Chlorine:0
PH:6.8
TA: 180
Cyanuric Acid: 150

I have an underground concrete pool with 4000gallons. I have been trying to lower the TA over the last 3 weeks with muriatic acid and have been successful however when I try to raise the ph using ph plus/borax the TA increases as well. My chlorine levels disappear very quickly despite adding chlorine daily. I cant seem to get my levels balanced. How do I raise my ph without raising the alkalinity?? Please help!