Tested my water 4 days ago and got
Added 10 lbs of baking soda (Arm and Hammer) for inground pool at 45,000 gallons. Also added 1 lb of granular diclor. I also use Trichlor tabs in a float.
Retested today and got:
It is a bit green and hazy after coming back from vacation last week. Overnight FC test did not change. I have not added and water or other chemicals over those days. Any idea why my pH would change like that? I know that adding sodium bicarb is not supposed to change pH much if at all. Looking for suggestions before I go and buy more dry acid. Thanks.