Okay, so I had a bat in my pool, don't know how long he was in there, but at least 8 hours. So I need to hyperchlorinate (super chlorinate) Pool store said bring the chlorine level up to 20ppm for three days. What will it take me to get me there. Does this seem like an excessive amount of Chlorine. I just corrected a green pool which was not easy, so in the last week I have used 10 ounces of Copper algecide and 4 pounds of shock, and 6 (3 inch)Chlorine tablets. My test kit only tests PH and Chlorine, after all that my chlorine level was 3 today and PH normal, but I just tossed in two more pounds of shock. At least the water cleared but now a bat jumps in and dies. UGH! What do I need now?