I am struggling getting my chlorine level up after opening my pool. I opened 3 days ago. Pool was cloudy but blue. Some dead worms and other junk in at the tiem. Have been running filter 24-7 since. water is clear now. My trouble is that since I opened I dumped 9 large jugs of 6% bleach in. Plus about 8 pounds of granular shock, The Cl level was up to about 6 when I checked after the initial 9 jugs. But has since dropped back to about 1.

36k gallon gunite
Alk - 140 a bit high
PH 7.3

I was using bleach left over from last year. Could it have lost some strength over the winter?
I am going to get more bleach today. Should I just keep bleaching and be patient. I just don't remember struggling like thisother years.