I've cared for my pools for 20 years and have never had this kind of a problem.

Pool is 33,000 gallons
Chlorine is 10+
PH is 7.2
Alkalinity is 110
My stabilizer and solids are fine-tested at pool store.

I've tried algaecide, shock treatments, etc. and the stuff almost seems to thrive on it. I've never tried bleach. Is that something that might work? How much bleach would I need? My chlorine levels have been over 5+ for 3 weeks and yet there is no reduction in algae. Now I can't even see the bottom of the pool. My PH was 7.6 but it's been lowered because of added acid to get the alkalinity in line. What should I do?