Here are my numbers from the pool store:

CYA: 25
Free Cl: 2.5
Tot Cl: 2.5
pH: 8.4
Alkalinity: 151
Hardness: 246

I have a 23,300 cement IG pool with a sand filter. Water is not that bad, I can see the bottom at the shallow end but cannot in the deep end.

What can I do to get this crystal clear?