Why am I not using any Bleach?

I have a 16,000 fiberglass in ground. Last year it seemed like I was adding a gallon of bleach every few days. I have not used much at all this year. My level seems to just hang in there at 5.5 ppm.
FC 5.5
CC .5
PH 7.5
ALK 230
CAL 230
CYA 35
Temp 83
I am concerned about the ALK, should I be? My ps-233 test kit has always shown a .5 on combined chlorine. I guess I'm second guessing yself alot. Could someone please help me understand better?

Have you shocked the pool to try and get rid of the CC? If not, I would suggest doing that. Also, read the sticky in the alk forum for how to lower alk.