I live in Maryland and last night we had a flash flood. My crystal clear pool is now a brown pond. I started the filter 24/7 backwashed once, raised chlorine level to over 6 ppm, (cya pre flood 20 ppm) lowered PH to 7.3. I can hardly see the first step. Should I drain and refill or let the filter (DE) and Chlorine take care of the problem. I am concerned about what could have been washed in (fertilizer, pesticides etc.) that the chlorine and filter will not take out. I would appreciate any advice.
Regards

Amir