First, thanks for all the great information y'all provide.
I just moved into a new house with a 'new to me' pool. I took my water in to be tested about two weeks ago. The numbers the pool store came up with were:
Temp 85 (sample was close to an hour old by the time we got there)
Adjusted TA 39
My test kit arrived the next day and my numbers pretty much aligned with theirs with exception of the pH:
Adjusted TA 31
I'd used this pool store for several years, and followed their recommendations and had good success with the pool at my old house. They are half way across town from the new house so I'm trying to do more of this myself instead of finding someone closer that I actually trust. They recommended that I add 31lbs baking soda to get the TA up where it should be and 3 cups muriatic acid. That sounded like an incredible amount to be adding and I was unsure of my volume estimate on the pool so I started with 26lbs and 2.5 cups of acid. I retested 48 hours later and TA had come into range, but the pH had gone too high:
pH 8.0+ (demand test took 5 drops to get back to 7.6)
Adjusted TA 115
From this point I've been watching the pH daily and adding muriatic acid in small batches (about 3-4 cups at a time) to try to get the pH back in line. After adding nearly a gallon over the last week, this morning's numbers are:
Adjusted TA 90
I know my FC is way low and my CYA is way high. The previous owner used only tabs and I've stopped that. I'd like to do a water replacement, but our water table here in North Texas is very high. I'm hoping to wait until mid summer when we have been very dry so there is less chance of damage during a drain and refill. Now that you've read the book, here are my real questions:
1. Given my high CYA and what I've read, my target FC should be in the 10-12 range until I can get my CYA down. Is this correct?
2. Do I just keep adding acid in small batches until I get the pH back in line or should I be doing something different? Just seems like I've added an awful lot in a short time.
Thanks in advance for any advice y'all have. I've heard you like pictures so: