Well, I had the CL levels at 23 ppm overnight last night and I added Alum to the filter to act as a filter aid. I woke up this morning and checked the pool. It is almost totally clear and clean. The CL level dropped to 19.5 ppm overnight, so something was being metabolized. In fact, after adding the bleach last night to get the levels above 20 ppm, I was in the yard and could smell the chlorine smell half way across the yard.

I don't think that adding 6.5 gallons of bleach to 12,700 gallons of water would make it smell so strongly. I am assuming it was chloramines from something breaking down. I can hardly smell anything this morning and the CL is still high at 19.5 ppm. I am going to try to keep it up near 20 for the rest of the day just to make sure everything is dead.