I am considering adding borates to my pool, but my problem isn't rising pH and TA, it is that it is constantly falling.
We purchased the house last winter. Last year was a bit of a disaster, I hadn't a clue what I was doing and it took me months to get the pool clear. I wish I had come here earlier, but I did the pool store thing. The pool was leaking an inch and a half a day.
I replaced the vinyl liner this spring, have new water, no leaks, and a fresh take on how to care for it. At the end of the summer I had 8 16oz bags of Dichlor and a 40 pound tub of trichlor. I have used those to chlorinate the new water in order to get a little CYA into the mix. I've added all 8 bags and dissolved about 5 pucks using the in-line chlorinator. According to the calculations, this should have made my CYA about 20. I haven't added any stablizer. The water has been cold, the weather just got warm, so I'm adding about 2 ppm a day of liquid chlorine.
Before I start on any new addition of borates, is it normal for pH and TA to slowly decline? I only add about an inch of water a week now, but pH goes down about .2 every other day, and TA drops about 10 ppm a week. This was happening last year as well (much faster though!), but I thought it was water replacement. It hasn't rained much here near Atlanta, so I'm not sure why the drop. I was excited about borates stabilizing pH, but it seems that it helps it not RISE. I don't have that problem.
Is it normal for it to drop slowly?
Thanks in advance, and thank you!