Pool been fine most of summer except for the last 2 weeks with all the rain we have been getting. Algae keeps coming back even after a shock, and vacuum to waste. Plus then a healty dose of 60% algecide.
Just did the shock 3 days ago, and the algea is back again!
FC is 3.8 ppm, TC is 3.8 ppm, CC is 0, PH is 7.4, TA is 240 ppm, CYA is 50 ppm.