Moving to a new house and the pool hadn't been started up this year at all...was a green swamp. Same pool as in my signature except no SWG (yet). Started shocking last Sunday (July 1) - been checking chlorine usually twice a day, morning and night and trying to keep at shock levels. I also used 2 bottles of algecide last Monday - water turned a milky white and stayed that way all week. On Saturday, I started adding DE to the sand filter (enough to raise filter pressure 1 psi) and been adding it after every backwash. The backwash is a milky white that is coming out so it seems to be filtering out some of the dead algae.
Checked all my numbers last night and here is what I had:
FC = 3.5
CC = 2
TA = 170
CH = 250
CYA < 20
pH < 6.8
I shocked the pool up to 10 last night and added 3 boxes of washing soda (per the pool calculator). I also have stabilizer in a sock to up the CYA.
I checked this morning and had:
FC = 1.5
CC = 2
ph > 8.2
The water doesn't look milky anymore but is a pale blue cloudy color - I can see down to the bottom of my strainer basket but that's about it. I feel like I am running in circles - something is obviously still consuming chlorine and I have brushed the pool but I can't see the bottom. There shouldn't be much for leaves in it - it was not covered over winter but we don't have any trees nearby.
Do I need to bring my pH back down? Why did it overshoot so much?
Thoughts on what else to do? Am I missing something or do I just need to be more patient?