BigDave: My daughter thanks you (as do I)!!!! I will do as advised.

oh- Why am I super diligent (crazy) about keeping the pool covered- especially at night????
Main reason I got a pool was for my youngest (I have 4) who has special needs. Also the main reason I paid big bucks to get an automatic pool cover. He loves water but can be impulsive and loves to get up early (4:30am) and get into trouble. Twice during pool construction (during excavation) he ran out and attempted to jump into the hole from our deck.

But I read about the chemical build-up that occurs during shocking so I will be extra careful in keeping him away from the open water, and keep the cover open until this chlorine issue is resolved.
thanks again.