I have probably put in 7 or 8 gallons of muric acid this year.
I don't know or really care where ALK is. I know it is not 0 and it is under 100 from the last test, and 3 gallons of muric acid added.
I must have the most alkaline rain anywhere. I had PH at 7.2. after 2 days of rain, it is up to 7.8 again. if not more
I know the answer is more acid.... i will wait till it is done raining, circulate the water and test again.
There is no aeration that i know of going into the pool.. but every few weeks i add a gallon of acid, and it goes down, but up again.
Started the year at 220 alk thanks to pool store... but of course their test showed 100.. donkey's.
Just talking... unless someone can think of anything... but I guess my pool is just how it is as i have read, they all vary on this issue.